Ranking · Sleep apps
The 5 Best Sleep Tracker Apps of 2026
A phone by the bed or a watch on your wrist: which sleep app is worth using, what’s free, and what the numbers can and can’t tell you.
A sleep app can show you a lot about your nights, but it can’t measure your sleep the way a sleep lab does. Every app here estimates. Our top pick is Sleep Cycle, the long-standing standard for tracking sleep with nothing but your phone. Leave it by the bed and it listens to your breathing and movement, wakes you with a smart alarm during a lighter stretch of sleep and charts each night. The alarm and the nightly analysis stay free; long-term trends need Premium.
If you wear a watch to bed, choose the app built for it: AutoSleep for Apple Watch, Garmin Connect for Garmin. Sleep as Android gives Android users the most control, and Pillow has a useful free tier for Apple Watch owners. Prices are as of November 2026.
Our picks at a glance
- Best overallSleep Cycle4.2/5
- Best for Apple Watch ownersAutoSleep4.1/5
- Best if you wear a GarminGarmin Connect4.1/5
- Best for Android power usersSleep as Android4.0/5
- Best free tier for Apple WatchPillow3.8/5
Compare the apps side by side
| App | Our score | Price | Platforms | How it works | Free tier |
|---|---|---|---|---|---|
| Sleep Cycle | 4.2 | Free; Premium plans listed up to $57.99 | iOS, Android, Apple Watch, Wear OS | Your phone by the bed (listens for breathing sounds, or senses movement); watch optional | Yes: smart alarm and nightly analysis (you start a trial first) |
| AutoSleep | 4.1 | $9.99 one-time, no subscription | iPhone with Apple Watch | Apple Watch worn to bed (Series 4 or newer); tracks automatically | No: paid app (one-time) |
| Garmin Connect | 4.1 | Free with a Garmin device; Connect+ $69.99/yr | iOS, Android | A Garmin watch or tracker (required) | Yes: sleep score, Body Battery, HRV and training metrics |
| Sleep as Android | 4.0 | Free (limited); lifetime unlock $84.99, or a subscription | Android, Wear OS | Android phone (motion or sonar) or a connected wearable | Limited: tracks every other night, with ads |
| Pillow | 3.8 | Free; Premium $39.99/yr | iPhone, iPad, Apple Watch | Apple Watch (automatic) or iPhone on the mattress | Yes: automatic Apple Watch tracking and basic analysis |
Read sleep data as an estimate. None of these apps is a polysomnograph, the overnight sleep-lab test that records brain waves, eye movements, breathing and heart rhythm. Phone apps infer your sleep from sound and movement, and watches add heart rate. Total sleep time and wake-ups are the most dependable numbers; the split into light, deep and REM sleep is an estimate. We haven’t measured any of these apps against a sleep lab.
The picks, in detail
Sleep Cycle
- Not measured
- Platforms: iOS, Android, Apple Watch, Wear OS
- Price: Free; Premium plans listed up to $57.99
Sleep Cycle needs no wearable, which makes it the easiest place to start. By default it uses your phone’s microphone and, the company says, estimates your sleep stages mainly from your breathing sounds. You can switch to motion sensing, with the phone on the mattress, instead.
Its best feature is free: a smart alarm that wakes you within a window you set, up to 90 minutes, when you seem to be sleeping lightly. Trends, snore recordings and automatic Apple Watch tracking need Premium. Two catches: you have to start a Premium trial before you reach the free version, and the App Store lists Premium plans up to $57.99 without saying which billing period each covers, so check the price screen before the trial ends.
Pros of Sleep Cycle
- Works with just your phone; no wearable needed
- Smart alarm and nightly analysis are free
- On iPhone and Android, with Apple Watch and Wear OS support
Cons of Sleep Cycle
- You must start a Premium trial to reach the free version
- Trends and snore recordings need Premium
- Premium pricing isn’t clearly published
AutoSleep
- Not measured
- Platforms: iPhone with Apple Watch
- Price: $9.99 one-time, no subscription
If you already sleep in your Apple Watch, AutoSleep is the easiest way to get detailed data from it. It tracks automatically, with nothing to start or stop, and adds a readiness score, overnight heart-rate variability (HRV), wrist temperature and a “sleep bank” that shows whether you’re running a deficit.
And it’s the cheapest paid option here: $9.99 once, with no subscription. You’ll need an iPhone and an Apple Watch Series 4 or newer. If the watch spends the night on its charger, AutoSleep logs only your time in bed, and snore detection lives in a separate app.
Pros of AutoSleep
- Tracks automatically, with nothing to start
- One-time $9.99, no subscription
- Readiness, HRV and wrist-temperature data
Cons of AutoSleep
- Needs an Apple Watch Series 4 or newer and an iPhone
- Logs only time in bed if you don’t wear the watch
- Snore detection needs a separate app
Garmin Connect
- Not measured
- Platforms: iOS, Android
- Price: Free with a Garmin device; Connect+ $69.99/yr
If you wear a Garmin, you already own a capable sleep tracker. Garmin Connect gives compatible devices a free sleep score, sleep stages, Body Battery (Garmin’s estimate of your energy reserves) and HRV status, and its smartwatches add a sleep coach.
It works only with Garmin hardware, and newer extras increasingly sit behind Connect+, at $69.99 a year. In one lab comparison, the Garmin devices tested were worse than a research-grade wristband at telling sleep from wakefulness. Its score covers the whole app, which is strongest for training; see our fitness tracker ranking.
Pros of Garmin Connect
- Sleep score, Body Battery and HRV status are free with the watch
- One app for sleep and training
Cons of Garmin Connect
- Works only with Garmin hardware
- More new features need Connect+ ($69.99/yr)
- Garmin devices tested weak at telling sleep from wake
Sleep as Android
- Not measured
- Platforms: Android, Wear OS
- Price: Free (limited); lifetime unlock $84.99, or a subscription
Sleep as Android does more than any other app here, and lets you configure nearly all of it. It tracks with your phone’s motion sensor or with “sonar,” so the phone doesn’t have to touch the bed. It connects to a long list of wearables, from Pixel and Galaxy watches to Garmin and Polar, detects snoring, and can make you solve a math problem or scan a QR code before the alarm will stop.
The free version is restrictive: after a 7-day trial, it tracks only every other night and shows ads. Unlocking it means a subscription or a one-time unlock listed at $84.99 on Google Play.
Pros of Sleep as Android
- More features and settings than any other app here
- Contactless sonar tracking and wide wearable support
- Wake-up challenges for heavy sleepers
Cons of Sleep as Android
- Free version tracks only every other night, with ads
- Lifetime unlock listed at $84.99
- Android only
Pillow
- Not measured
- Platforms: iPhone, iPad, Apple Watch
- Price: Free; Premium $39.99/yr
Pillow is built around the Apple Watch, and its free tier is unusually useful if you wear one to bed: automatic tracking, a sleep-stage breakdown, heart-rate stats and your history, synced with Apple Health. The smart alarm, detailed analysis and snore recordings are Premium, at $39.99 a year.
Skip its phone-on-the-mattress mode. In an independent test of 11 trackers against a sleep lab, that mode had the weakest sleep-stage agreement, labeling 59% of the night as deep sleep against 10.8% in the lab. Its Apple Watch mode wasn’t part of that test.
Pros of Pillow
- Free automatic Apple Watch tracking
- Syncs with Apple Health
Cons of Pillow
- Smart alarm needs Premium ($39.99/yr)
- Phone-on-mattress mode tested worst for sleep stages
- Apple devices only
What a sleep app can and can’t tell you
Sleep labs use polysomnography: sensors on your scalp, face and chest record brain waves, eye movements, breathing and heart rhythm through the night. That’s how sleep stages are defined. A phone or watch can’t read brain waves, so it infers your sleep from movement, sound and heart rate.
Independent tests show the limits. In a 2021 study in the journal Sleep, seven consumer trackers were compared with polysomnography: they were good at detecting sleep but poor at detecting wakefulness, and their sleep-stage results were inconsistent. A 2023 study of 11 trackers found wide differences between devices. So:
- Total sleep time and timing are the useful numbers. Stage percentages are estimates.
- Watch trends, not single nights. One night’s score is noisy.
- If you feel worse than your score says, trust yourself. Trackers can count quiet wakefulness as sleep.
How to choose
Match the app to what you’ll actually have with you at night:
- Just your phone: Sleep Cycle.
- An Apple Watch you wear to bed: AutoSleep for the most detail for a one-time $9.99, or Pillow for a free tier if you can live without its smart alarm.
- A Garmin watch: the Garmin Connect app you already have.
- An Android phone, and you like to tinker: Sleep as Android.
If you share a bed, a phone-based tracker can pick up your partner’s sounds and movement as well as yours; a watch on your own wrist avoids that. Whichever you choose, give it two weeks before you draw conclusions.
How we tested
We haven’t lab-measured sleep apps, so this ranking doesn’t rest on a measurement, and every app in it carries a “Not measured” label. We compared the apps on the features that matter for the job, what each free tier includes, what the paid plans cost and each app’s consensus standing: what independent reviewers and, where it exists, published research say about it. We checked every price against the app’s own plan pages and store listings in November 2026.
How we ranked: we started with apps that track sleep, then ordered them on how well they serve most people, then on free tier and price. Sleep Cycle leads because it needs only your phone and keeps its core features free; each of the others is the best choice for a particular device. AutoSleep and Garmin Connect have the same score; AutoSleep ranks higher here because it’s a dedicated sleep app, while Garmin Connect’s score rests mostly on its training features.
Frequently asked questions
What is the best sleep tracking app?
For most people, Sleep Cycle. It works with just your phone, and its smart alarm and nightly analysis are free. If you wear an Apple Watch to bed, AutoSleep gives you more detail for a one-time $9.99.
Are sleep tracking apps accurate?
They’re reasonable at telling you how long you slept and when, and much weaker on sleep stages. In lab comparisons, consumer trackers were good at detecting sleep but poor at detecting wakefulness, and their stage breakdowns were inconsistent. Treat light, deep and REM figures as estimates.
Do I need a smartwatch to track my sleep?
No. Sleep Cycle and Sleep as Android work with just your phone. A watch adds heart rate, which helps the estimates, and it tracks only you, not whoever shares your bed.
Can a sleep app detect sleep apnea?
None of the apps in this ranking can diagnose it. If you snore loudly, someone has seen you stop breathing in your sleep, or you’re very sleepy during the day, talk with a healthcare professional. A sleep study is how sleep apnea is diagnosed.
Is Sleep Cycle free?
Partly. The smart alarm and nightly analysis are free, but you have to start a Premium trial first and cancel it to keep the free version. Long-term trends and snore recordings need Premium. Read our Sleep Cycle review.
Prices as of November 2026. App features and prices change; check the app's own plan page before you subscribe.