The Best Sleep Apps (2026)

Search "best sleep app" and you get the same wall of five-star ratings: rain sounds, a celebrity reading you a story, a purple graph of last night, a program that says it was built with doctors. They all sell the same promise, and the store page never tells you which one was designed for insomnia and which one is a playlist with a moon on it.

Here's the honest answer up front: the best sleep apps of 2026 are not all interchangeable. They fall into three groups that do genuinely different jobs: trackers, wind-down audio, and complete sleep programs. Which one helps you depends on what's keeping you awake. Below is what each of the main apps actually does, what it costs, and who it suits.

Full disclosure: we build Rest, one of the apps on this list. We've tried to be straight about where it wins and where it doesn't, and to give every other option a fair read.

What Separates a Real Sleep Program from a Tracker or a Sound Library?

Most "best sleep apps" roundups treat Calm, Sleep Cycle and Rest as if they compete for the same slot. They don't. Here we separate them into three groups for three different jobs.

Trackers and alarms

Sleep Cycle, AutoSleep, and the sleep tab of most wearables. A phone microphone or the sensors on a watch estimate when you fell asleep, how long you were out, and roughly which stage you were in, usually with a smart alarm that wakes you at a lighter point inside a window. The better ones also hand you advice based on what they see: keep your wake time steady, move bedtime earlier, watch the late drink. That advice isn't wrong, but advice is where it stops. A tracker can tell you that you were awake for 90 minutes at 3am. It won't tell you what to do about it, change anything when the week goes badly, or hold you to a plan.

So the honest limit of this category is that data on its own doesn't make anyone sleep better. The numbers are also rougher than the interface suggests. When researchers tested seven consumer sleep trackers against polysomnography, the lab standard, the devices were very good at spotting sleep but only fair at spotting wake, and their sleep-stage estimates were inconsistent [3]. There's more detail on how accurate sleep trackers really are, including what the newer pooled data shows. That's an awkward weakness to have if you're the one lying awake, because the wake is the whole problem: the 40 minutes it took to drop off, the hour you lost at 3am. There's a failure mode with a name, too. Clinicians have described cases of orthosomnia, in which preoccupation with tracker scores appeared to intensify sleep anxiety, with some patients spending longer in bed trying to improve the number [2]. That's a small case series rather than evidence of how common it is, but the pattern is easy to recognize in yourself once you know it exists.

Where tracking genuinely earns its place is next to a program. Every behavioral program runs on a nightly sleep diary, and having that diary mostly fill itself in each morning removes the small daily admin that people quit over. Data plus a plan is a powerful combination. Data on its own is a hobby.

Meditation, stories, and sounds

Calm, Headspace, BetterSleep, and every white-noise app you've tried. Three flavors sit under this heading. Sleep stories are narrated audio written to be deliberately uneventful, so your attention has somewhere to go that isn't tomorrow's to-do list. Guided meditation and body scans train attention and slow breathing. The same relaxation techniques that appear inside clinical programs, just unbundled. Ambient sound may help some people mask environmental noise: a steady rain or fan track raises the noise floor of the room so a door down the hall doesn't spike above it. Be aware the evidence is thinner than the category's popularity suggests. A systematic review of continuous noise as a sleep aid graded the quality of evidence for it improving sleep as very low, with some studies finding it disrupted sleep instead [6]. There's a fuller answer on whether brown noise helps you sleep, and when masking is genuinely worth it.

The mechanism that matters here is pre-sleep arousal: insomnia isn't only a shortage of sleepiness, it's a body and mind that stay switched on at bedtime. Bringing that down genuinely makes falling asleep easier, and the trial data reflect it: an eight-week randomized trial of Calm in adults with sleep disturbance found reductions in cognitive and somatic pre-sleep arousal, daytime fatigue, and sleepiness against a wait-list control [5]. What it doesn't touch is the pattern underneath chronic insomnia: the hours awake in bed, the learned association between your mattress and being wide awake, the 3am spiral. The risk is that they feel like progress. Putting on a sleep story every night is doing something, so you can keep a perfect streak for months, feel like you're finally working on the problem, and arrive at month six with your insomnia exactly where it started, because nothing in that routine was ever aimed at what's keeping you awake.

Complete sleep programs

A program is not a library you dip into. It has a beginning, a defined arc of five to eight weeks, and instructions that change based on your own data. You log your nights; it gives you back something specific: what time to get into bed, what time to get up regardless of how the night went, what to do when you're staring at the ceiling; and revises those instructions as your sleep shifts. The content isn't really the product. The feedback loop is.

That's why a program asks more of you than anything else here. Some techniques are counter-intuitive and get harder before they get easier: sleep restriction shortens your time in bed to rebuild sleep pressure, so the first week or two often leaves you more tired, not less, and stimulus control asks you out of bed exactly when that is the last thing you want. That effort is the point, because the mechanism is behavior change rather than consumption.

Within the group, the difference comes down to who drives that feedback loop:

• Self-guided. You work through the program alone: modules, a diary, and rules that update on a set schedule. Sleepio (by prescription) and the free CBT-I Coach and Insomnia Coach apps from the U.S. Department of Veterans Affairs (VA) both work this way, at opposite ends of price and access. Cheapest and most flexible, and the easiest to quit in week two when it gets uncomfortable.

• Human-guided. An app plus a named coach who reads your diary and messages back adjustments, like Sleep Reset. Real accountability from a person, on that person's schedule, and at the highest price in this category.

• AI-guided. The coaching happens as a conversation, every day, by text or voice, whenever you're awake. Rest works this way. It's the closest thing to daily human support at consumer prices.

One distinction matters more than any of those: whether the program is built on CBT-I (Cognitive Behavioral Therapy for Insomnia). CBT-I is the recommended first-line treatment for chronic insomnia, ahead of medication [1], and its behavioral core is what actually breaks the pattern. A program organized around something else, whether that's circadian timing, sleep-hygiene tips, or general wellness habits, can still be useful, but for insomnia that's lasted months it usually isn't enough on its own.
For a deeper ranking of the CBT-I programs, see the best CBT-I apps.

Which group fits depends on what your nights look like. If bedtime is mostly a busy head or a loud street, wind-down audio may be the most useful thing you download. If you want to see patterns or wake up less groggy, a tracker does that job well. And if sleep has been off for months, years of broken nights or waking at 3am and not getting back to sleep, that pattern is usually kept going by behaviors and conditioned arousal, and a complete program is the type of app built to address that layer.

Plenty of people end up using one of each.

The Best Sleep Apps of 2026, Compared

Cost and availability are approximate (accessed August 2026).

Sleepio (SleepioRx)

Sleepio, from Big Health, has the deepest published evidence base of any app here, built on work from Colin Espie's lab at Oxford and recommended by the UK's National Institute for Health and Care Excellence (NICE) [4]. In the United States it's offered as SleepioRx, cleared by U.S. regulators as a prescription digital therapeutic and delivered as six weekly automated sessions led by an animated narrator [4]. Between sessions you keep a sleep diary (Fitbit import available), get reminders, and can use relaxation audio, a large article library, and a user community. You can pause mid-course if life gets in the way. We cover the CBT-I detail in Rest vs Sleepio.

Strengths

• Strongest peer-reviewed evidence base on this list, including placebo-controlled trials.

• Can cost nothing when an employer or health plan covers it.

Trade-offs

• Automated weekly modules rather than a daily conversation.

• Pausing stops the program until you resume.

• Without coverage, cash-pay is around $400, and most people can't just download it and start today.

Calm

Calm is the sleep app most people have already heard of. Under the hood it is a meditation and mental-health library, not a sleep program. The sleep lane is built around Sleep Stories (narrated audio that gives a busy mind something gentle to follow), soundscapes, music, and guided sleep meditations. The mechanism that matters for insomnia is pre-sleep arousal: calming cognitive and somatic activation so falling asleep is less of a fight. An eight-week randomized trial of the Calm app in adults with sleep disturbance found reductions in daytime fatigue, sleepiness, and both cognitive and somatic pre-sleep arousal versus a wait-list control, with better sleep quality linked to more use inside the intervention group [5].

That is real help for wind-down. It is not sleep restriction, stimulus control, or an adaptive sleep window. If your nights are broken by conditioned insomnia (bed = wake, watch the clock, panic at 3am), stories can make bedtime easier without changing the pattern underneath.

Calm's own App Store listing quotes $14.99 a month or $69.99 a year, though other price points circulate depending on where you sign up. A family plan covers six accounts for $99.99 a year, and a lifetime membership is sold on the website only [7].

Strengths

• Largest, most polished Sleep Stories and wind-down library in consumer apps.

• Some peer-reviewed support for reducing pre-sleep arousal and daytime fatigue.

• A free tier lets you sample before paying, though it's thin: day one of any multi-day program, one Sleep Story, and the background scenes [7].

Trade-offs

• A content library, not a behavioral insomnia program.

• Most of the catalog sits behind Premium.

• Easy to use every night and still have the same insomnia six months later.

Rest

Rest is the first fully AI-led program built on the principles of CBT-I, plus circadian biology and neuroscience. Instead of a weekly course or a static content library, it runs as a daily conversation, by text or voice, with an AI coach available around the clock. Each morning the coach reads your sleep log, talks through how the night went, and keeps you on the behaviors that rebuild sleep: a personalized sleep window that moves with your sleep efficiency, stimulus-control rules, cognitive work when your mind races, and education sequenced to where you are in the program.

The sleep log is the spine of that adaptation. You can connect a wearable through Apple Health. Rest pre-fills the log from that data; you still review and confirm it each morning. That is deliberate. Wearables are useful for time asleep and time in bed, but they often miss how long it felt to fall asleep and how long you were awake in the night. The program treats your subjective diary as primary and wearable data as support, never a replacement, because CBT-I decisions run on the sleep you actually experienced.

The free version is unusually complete for a paid program: nightly sleep log, the full educational program, relaxation audio, and the personalized sleep-restriction schedule.

Strengths

• Day-to-day guidance you can start today, with a coach you can talk to by text or voice whenever you need it, not only at a scheduled check-in.

• A genuine free tier. Only the AI coach and daily check-ins sit behind the paywall.

• Wearable pre-fill via Apple Health, with you confirming the log so the plan tracks lived sleep, not just sensor output.

• More than 2,000 five-star App Store ratings.

• English and Spanish; adapts when you tell the coach you're traveling or ill.

• Built with Rest's lead scientific advisor, Dr. Ashley Mason, PhD, of the University of California, San Francisco (UCSF).

Trade-offs

• Built on the principles of CBT-I, not a clinical treatment or a regulator-cleared device, and not a substitute for medical care.

• No peer-reviewed trial of Rest published yet.

• iOS only for now.

Headspace

Headspace is a broader mental-health and mindfulness app with a dedicated sleep lane: sleepcasts (non-linear ambient audio), wind-downs, soundscapes, and short guided practices. The sleep impact path is similar to Calm's, lower arousal and a structured wind-down, with more of a course-and-practice frame than celebrity Sleep Stories. A 2025 randomized trial of Headspace's Sleep Program in adults with clinical insomnia found greater improvements in insomnia symptoms and sleep efficiency than a wait-list control, with remission around 12–14%. Real gains, but well below what dedicated digital CBT-I trials typically report. The study authors are clear the program was not designed as digital CBT-I; it blends mindfulness with some CBT-I techniques in a shorter, more accessible format [8].

Annual pricing is about $70, or about $13 a month [9].

Strengths

• Structured mindfulness practice with a large sleep section.

• Some trial evidence for sleep and insomnia symptom improvement.

• Eligible for health savings and flexible spending accounts (HSA/FSA) on some plans; student and family options exist.

Trade-offs

• Sleep is one lane inside a wider mental-health product.

• Even the Sleep Program is not a full CBT-I course; chronic conditioned insomnia usually needs the behavioral core Calm and Headspace leave out.

• Like Calm, easy to mistake as the whole plan when it is really a wind-down tool.

Sleep Cycle

Sleep Cycle is the long-running phone-based tracker, and "tracker with a smart alarm" no longer covers it. The core is unchanged: you leave the phone by the bed, it estimates your night mainly from sound and movement (microphone is the recommended mode, with accelerometer or Apple Watch as alternatives), plots awake, light, deep, and REM, and runs the smart alarm that made its name, waking you at a lighter point inside a window you choose [10]. Around that it has added three things. Luma is an AI sleep coach launched at the end of 2025 that you chat with by text; general conversation is free, while coaching tied to your own sleep data needs Premium. Sleep Programs is a Premium set of guide collections on quieting a busy mind and handling stress. Sleep Aid is a library of sleep stories, music, sounds, and meditations [10].

What it still isn't is a behavioral insomnia program, and to its credit Sleep Cycle doesn't claim to be one. There's no sleep window, no sleep restriction, no stimulus control, and no weekly adjustment anywhere in the product, and its help center returns nothing at all for "insomnia." Their own Head of Sleep Science, Professor Michael Gradisar, draws the line himself when introducing the programs: traditional cognitive therapy for insomnia is "excellent to deal with worries," but "complex and takes time," so they picked "a few easier cognitive techniques" instead [10]. That's an honest description of what you get. Lighter tools, delivered well, on top of the best-known phone tracker. It's also the line between Luma and the coach inside a program like Rest: both are conversational AI, but only one is working from a sleep window that changes as your sleep does.

A free tier exists, with a quirk worth knowing: by Sleep Cycle's own support documentation you have to start the free trial and cancel it before the free features stick. Premium is sold at a wide spread of price points, from $2.99 up to $57.99 on the US App Store, so what you pay depends largely on which offer you happen to land on [10].

Strengths

• No wearable required. The phone does the work.

• Smart alarm is still the stickiest feature in the category.

• Now bundles an AI chat coach and a large audio library, so it does more than log your nights.

Trade-offs

• Tracking, tips, and audio, but no behavioral program underneath: no sleep window, no stimulus control, nothing that adapts week to week.

• No published evidence that using the app improves sleep or reduces insomnia severity.

• Stage accuracy is weak. In a polysomnography study, Sleep Cycle was not reliable enough for sleep-wake detection in either its accelerometer or its microphone mode, and none of the phone apps tested could identify REM sleep at all [11].

• Premium upsells are persistent, and you can't reach the free tier without starting a trial first and cancelling it.

Rise

Rise runs on two numbers. The first is your sleep need, the amount of sleep your body is wired for, which Rise works out from about a year of your phone-use history and treats as fixed rather than something you set. The second is your sleep debt, how far short of that number you've fallen over the past two weeks. From there it predicts how your energy will run through the day: the foggy stretch after you wake, when you'll be sharpest, when the afternoon slump lands, and the hour at night when your body is most ready for sleep, which it calls your Melatonin Window. Then it sends reminders timed around that, telling you when to get outside for daylight, when to stop drinking coffee, when to start winding down, and when to go to bed. Wearables are optional (Apple Health, Oura, Fitbit, WHOOP) and make the estimates sharper [12].

That can help if you are chronically short on sleep or living against your chronotype. It is a weaker fit if your problem is lying awake despite enough time in bed. Rise optimizes how much and when you sleep; it does not run CBT-I's stimulus-control and sleep-restriction rules for insomnia. If you already have insomnia, treat Rise's nap suggestions with care, because daytime sleep usually works against the sleep drive a behavioral program is trying to rebuild. Company-reported "feel better in days" figures are their own, not independent insomnia trials [12]. Membership is $69.99 a year after a seven-day trial, with no permanent free plan. Two extras are billed separately: an AI coaching add-on, and Rise's sleep clinic, which runs through insurance rather than the membership [12].

Strengths

• Clear focus on sleep debt and circadian timing, not just an overnight score.

• Works without a wearable, and integrates with several if you have one.

• Useful all-day energy schedule, not only a bedtime screen.

Trade-offs

• Not a CBT-I program for chronic insomnia.

• Everything sits behind a subscription once the seven-day trial ends. There is no permanent free plan.

• Paying down sleep debt can mean more time in bed, which is the opposite of what sleep restriction asks for when insomnia is the diagnosis.

BetterSleep

BetterSleep (formerly Relax Melodies) is built around a customizable sound mixer: stack up to about 15 ambient sounds plus music and a brainwave track, save mixes, run a timer, and optionally track the night. The idea is sound masking and a steady auditory focus: burying distracting noise and giving a racing mind something monotonous to follow [13]. Plenty of people find that helps, though as above, the published evidence for continuous noise improving sleep is rated very low quality [6]. It also ships SleepTales, meditations, and a smart alarm. Company outcome percentages on the marketing site are self-reported.

Useful when the room is loud or your brain needs a wall of brown noise. Not a plan for conditioned insomnia once the headphones come off.

Premium is typically about $60 a year, with lifetime offers that appear periodically [13].

Strengths

• Best sound-mixing control on this list if audio is what actually helps you drift off.

• Large catalog of stories and meditations aimed at bedtime.

• Works on iOS and Android.

Trade-offs

• Designed to help you fall asleep with sound, not to rebuild chronic insomnia with a behavioral plan.

• Deeper catalog sits behind Premium.

• Sound masking is popular but weakly evidenced as a way to improve sleep [6].

Sleep Reset

Sleep Reset pairs a dedicated human coach with an app-based program built on CBT-I principles. Coaching is text inside the app: coaches typically reply within about a day or two on U.S. weekday business hours, and the plan updates on roughly a five-day cycle. Real accountability, but not 24/7 instant chat [14]. It starts with a $19 one-week trial. Full head-to-head: Rest vs Sleep Reset.

Strengths

• Real human accountability, which helps a lot of people stick with the plan.

• Eligible for HSA/FSA.

Trade-offs

• At $297 a month after the trial, it's by far the priciest consumer option here, roughly seven times Rest's monthly price.

• Coaching support on CBT-I principles, not individualized in-person therapy.

• Human coaches work on human schedules; this is not around-the-clock messaging.

AutoSleep

AutoSleep turns an Apple Watch into an automatic sleep tracker: wear the watch to bed, get stages, trends, readiness-style metrics, and a smart alarm, with the maker emphasizing on-device data and no analytics upload. It's a one-time purchase (commonly in the $5–$10 range depending on region), with no subscription [15]. Clinically minded users like that it supports research-style exports; it still does not coach insomnia behavior.

Strengths

• No subscription.

• Hands-off tracking if you already sleep in a Watch.

• Privacy-forward design.

Trade-offs

• Apple Watch required for the full experience; iOS only.

• Pure tracking. It will not coach you through insomnia.

CBT-I Coach and Insomnia Coach (free, from the VA)

Built by the VA, the Department of Defense, and Stanford, these are two related free apps, not one product with two names. CBT-I Coach is a companion toolkit (diary, education, relaxation, automated sleep prescription) meant to sit alongside CBT-I you're doing with a provider. Insomnia Coach is a free five-week self-guided plan for people going it alone. Both are free to anyone, not just veterans [16].

Strengths

• Completely free on iOS and Android.

• Grounded in the same clinical method as paid CBT-I apps.

Trade-offs

• A fixed toolkit and plan rather than a program that adapts to you day by day.

• CBT-I Coach is designed to sit alongside a therapist, not replace one.

So Which Sleep App Should You Choose?

Match the app to the job. One strongest pick per situation:

• You have chronic insomnia and want a full behavioral program you can start without a prescription: Rest. It runs the principles of CBT-I as a daily habit you can talk to by text or voice whenever you need it, not a homework course. Dig into that lane in the best CBT-I apps.

• You want the strongest clinical and regulatory credential, and you have coverage or a prescribing clinician: Sleepio (SleepioRx).

• You want a real human coach checking in on you: Sleep Reset.

• You're on a tight budget and need behavioral tools, not just sounds: Rest's free tier on iOS. If you're on Android, use the VA's free CBT-I Coach and Insomnia Coach instead. See free CBT-I apps.

• Your schedule and energy are the problem, not lying awake in bed: Rise.

• You mainly need help winding down at bedtime: Calm, the household name for Sleep Stories and the biggest polished wind-down library here (Headspace is stronger if you want a structured mindfulness course with some insomnia-trial data).

The best sleep app is the one whose job matches your problem. If insomnia has lasted months, finishing a behavioral program matters more than collecting another week of sleep scores. And if your insomnia is severe, long-standing, or tied to another health condition, loop in a doctor alongside whichever app you choose.

Quick picks (recap):

• Best complete program you can start today (including day-to-day / 24/7 coach): Rest.

• Most clinically validated / regulator-cleared: Sleepio (SleepioRx).

• Best with a human coach: Sleep Reset.

• Best free behavioral tools: Rest's free tier (iOS); VA CBT-I Coach / Insomnia Coach (Android or either platform).

• Best for circadian energy and sleep debt: Rise.

• Best for winding down: Calm.

• Best Apple Watch tracker (no subscription): AutoSleep.

Also considered: Somryst and Stellar Sleep belong with the CBT-I field rather than this broader list; see the best CBT-I apps. Pillow overlaps Sleep Cycle and AutoSleep on tracking, so those two cover the job here.

Frequently Asked Questions

What is the best sleep app for insomnia in 2026?
For chronic insomnia, the best sleep apps are the ones built as behavioral programs on CBT-I principles, not trackers or sound libraries. Among consumer options you can start without a prescription, Rest is the strongest daily adaptive pick on this list. Sleep Reset fits if you want a human coach. Sleepio carries the strongest regulatory credential when you have coverage or a prescribing clinician.

What's the difference between a sleep tracker and a sleep app for insomnia?
A sleep tracker (Sleep Cycle, AutoSleep, and most wearable dashboards) shows what happened last night: duration, stages, sometimes a smart alarm. A sleep app built for insomnia changes the behaviors that keep you awake: your sleep window, stimulus control, and how you respond when sleep doesn't come. Charts can support a program. On their own, they don't change the behaviors that keep insomnia going.

Is Calm or Headspace good for insomnia?
Calm and Headspace can reduce pre-sleep arousal and make bedtime easier, and both have trial data for sleep-related symptoms [5][8]. They are not full CBT-I programs. If you've had insomnia for months, treat them as a wind-down complement, not the main plan.

What is the best free sleep app?
For a free behavioral toolkit, Rest's free tier on iOS (sleep log, education, relaxation audio, personalized sleep-restriction schedule) is the strongest free option on this list. The VA's CBT-I Coach and Insomnia Coach are free on iOS and Android. Sleep Cycle has a limited free tracking tier, though you have to start a trial and cancel it to unlock it. Rise does not offer a permanent free plan.

Are prescription sleep apps better than consumer sleep apps?
Prescription options like SleepioRx clear a regulatory bar and carry deep clinical evidence [4]. That doesn't make them the best fit for everyone. Coverage, a prescribing clinician, and whether you'll finish an automated course all matter. Many people can do better with a consumer program they'll actually open every day.

Can I use a sleep tracker and a CBT-I app together?
Yes. Many people keep a wearable or phone tracker for data and run a behavioral program for the change. Rest can pre-fill your sleep log from Apple Health (Apple Watch or another wearable synced into Health); you confirm the log each morning because the subjective diary still leads. Don't stack three meditation apps and call it a program.

How to Choose a Sleep App You'll Actually Use

If you've been hopping between trackers and Sleep Stories while insomnia keeps the same shape, you're not undisciplined. You've been shopping in the wrong aisle. Pick the app that does the job you actually need. If that job is rebuilding sleep that's been off for months, with someone you can talk to day to day, Rest is built for it: a daily AI coach, by text or voice, on the principles of CBT-I. See how Rest works and start today »

(Rest is a program built on the principles of CBT-I. It is not a treatment and not a substitute for medical care. App availability, features, and pricing for other products are approximate as of August 2026 and may change.)

Citations

1. Edinger, J. D., Arnedt, J. T., Bertisch, S. M., et al. (2021). Behavioral and psychological treatments for chronic insomnia disorder in adults: An American Academy of Sleep Medicine clinical practice guideline. Journal of Clinical Sleep Medicine, 17(2), 255–262. https://doi.org/10.5664/jcsm.8986 On CBT-I ahead of medication specifically: Qaseem, A., Kansagara, D., Forciea, M. A., Cooke, M., & Denberg, T. D., for the Clinical Guidelines Committee of the American College of Physicians (2016). Management of chronic insomnia disorder in adults: A clinical practice guideline from the American College of Physicians. Annals of Internal Medicine, 165(2), 125–133. https://doi.org/10.7326/M15-2175 (Recommendation 1: all adult patients should receive CBT-I as the initial treatment for chronic insomnia disorder; medication is considered only where CBT-I alone was unsuccessful.)

2. Baron, K. G., Abbott, S., Jao, N., Manalo, N., & Mullen, R. (2017). Orthosomnia: Are some patients taking the quantified self too far? Journal of Clinical Sleep Medicine, 13(2), 351–354. https://doi.org/10.5664/jcsm.6472

3. Chinoy, E. D., Cuellar, J. A., Huwa, K. E., et al. (2021). Performance of seven consumer sleep-tracking devices compared with polysomnography. Sleep, 44(5), zsaa291. https://doi.org/10.1093/sleep/zsaa291 (Epoch-by-epoch sensitivity for detecting sleep was high across devices, ≥0.93; specificity for detecting wake was low to medium, 0.18–0.54; sleep stage assessments were inconsistent, and devices performed worse on nights with disrupted sleep.)

4. Espie, C. A., Kyle, S. D., Williams, C., et al. (2012). A randomized, placebo-controlled trial of online cognitive behavioral therapy for chronic insomnia disorder delivered via an automated media-rich web application. Sleep, 35(6), 769–781. Additional Sleepio evidence: Espie et al. (2019), JAMA Psychiatry; Freeman et al. (2017), Lancet Psychiatry. FDA 510(k) K233577 (SleepioRx, Aug 2024). NICE HealthTech guidance HTG624: nice.org.uk/guidance/htg624. Coverage and cash-pay (~$400): bighealth.com/sleepio-rx; Sleepio FAQ on between-session tools and pausing: info.sleepio.com/faq (accessed Aug 2026).

5. Huberty, J. L., Green, J., Puzia, M. E., et al. (2021). Testing a mindfulness meditation mobile app for the treatment of sleep-related symptoms in adults with sleep disturbance: A randomized controlled trial. PLOS ONE, 16(1), e0244717. https://doi.org/10.1371/journal.pone.0244717

6. Riedy, S. M., Smith, M. G., Rocha, S., & Basner, M. (2021). Noise as a sleep aid: A systematic review. Sleep Medicine Reviews, 55, 101385. https://doi.org/10.1016/j.smrv.2020.101385 (Review of 38 studies. Following GRADE criteria, the quality of evidence for continuous noise improving sleep was very low, with findings ranging from improved to disrupted sleep.)

7. Calm. Calm Premium pricing, free-tier contents, family and lifetime options. calm.com; calm.com/family; Calm Help Center (free tier: day 1 of multi-day programs, one Sleep Story, background scenes; 7-day trial; Family $99.99/year for six accounts; lifetime sold on the website only). U.S. App Store listing id 571800810, developer description quoting $14.99/month and $69.99/year; other active price points ($16.99/month, $79.99/year) appear in the same listing (accessed Aug 2026).

8. Staiano, W., Callahan, C., Davis, M., Tanner, L., Coe, C., Kunkle, S., & Kirk, U. (2025). Assessment of an app-based sleep program to improve sleep outcomes in a clinical insomnia population: Randomized controlled trial. JMIR mHealth and uHealth, 13, e68665. https://doi.org/10.2196/68665 (Headspace Sleep Program; authors state it was not designed as digital CBT-I; remission ~12–14% vs higher rates in dedicated CBT-I programs such as SHUTi.) Also: Torok, Z. A., Gavrilova, L., Patel, A., & Zawadzki, M. J. (2026). The effectiveness of the Headspace app for improving sleep: Randomized controlled trial. Journal of Medical Internet Research, 28, e56287. https://doi.org/10.2196/56287 (daily Headspace meditation; improved subjective sleep quality vs wait-list.)

9. Headspace. Headspace subscription options and sleep content. headspace.com; App Store listing id 493145008 ($12.99/mo or $69.99/year; accessed Aug 2026).

10. Sleep Cycle AB. Motion and sound detection, sleep staging estimates, smart alarm, Luma AI coach, Sleep Programs, Sleep Aid, freemium vs Premium. sleepcycle.com; sleepcycle.com/luma (Luma launched Dec 2025, text chat, general conversation free and personalized insights on Premium); sleepcycle.com/newsroom/press-release/sleep-cycle-launches-luma; support.sleepcycle.com (motion detection; Sleep Programs and Sleep Aid as Premium features, comparison article updated Jun 2026; free tier requires starting and cancelling a trial, article updated Jul 2026; no help-center results for "insomnia"). Gradisar quotation from sleepcycle.com/sleep-talk/sleep-programs-relax-the-mind. U.S. App Store listing id 320606217 shows ten Premium in-app purchase price points from $2.99 to $57.99; Apple does not publish the billing term for individual SKUs (accessed Aug 2026).

11. Fino, E., Plazzi, G., Filardi, M., Marzocchi, M., Pizza, F., Vandi, S., & Mazzetti, M. (2020). (Not so) Smart sleep tracking through the phone: Findings from a polysomnography study testing the reliability of four sleep applications. Journal of Sleep Research, 29(1), e12935. https://doi.org/10.1111/jsr.12935 (Sleep Cycle was tested in both accelerometer and microphone modes and was not sufficiently reliable for sleep-wake detection against polysomnography; none of the four apps tested could detect or score REM sleep.)

12. Rise Science. Sleep need (treated as genetically set, estimated from ~1 year of phone-use history), sleep debt (rolling 14-night window, last night weighted ~15%), circadian energy schedule and Melatonin Window, habit reminders, wearable integrations, membership and add-ons. risescience.com; help.risescience.com (Sleep Need, Sleep Debt, and Energy Schedule articles); risescience.com/expert-care (sleep clinic billed through insurance). App Store listing id 1453884781 and Google Play listing com.risesci.nyx ($69.99/year, 7-day trial, no permanent free plan, iOS and Android; accessed Aug 2026). Company-reported user-benefit figures are the company's own.

13. BetterSleep (Ipnos). Sound mixer (up to ~15 sounds + music + brainwave), SleepTales, meditations, tracker. bettersleep.com; BetterSleep help center getting-started guide. App Store listing id 314498713 (Premium commonly ~$59.99/year; accessed Aug 2026). Company-reported outcome percentages on marketing pages are the company's own.

14. Sleep Reset. CBT-I-based program, human-coaching model, text coaching (typically 24–48 hours on U.S. weekday business hours), plan updates ~every 5 days, pricing ($19 one-week trial, then $297/month; HSA/FSA eligible, though not billed through traditional insurance). thesleepreset.com (accessed Aug 2026).

15. AutoSleep (Tantsissa). AutoSleep Apple Watch sleep tracker; one-time purchase, no subscription; on-device data. autosleepapp.tantsissa.com; App Store listing id 1164801111 (one-time price commonly ~$5–$10 by region; accessed Aug 2026).

16. U.S. Department of Veterans Affairs, National Center for PTSD. CBT-I Coach and Insomnia Coach (free apps). ptsd.va.gov; mobile.va.gov/app/cbt-i-coach. Kuhn, E., Weiss, B. J., Taylor, K. L., et al. (2016). CBT-I Coach: A description and clinician perceptions of a mobile app for cognitive behavioral therapy for insomnia. Journal of Clinical Sleep Medicine, 12(4), 597–606. (accessed Aug 2026).