Sleep Cycle
An app that tracks your sleep with your phone and wakes you gently.
What Sleep Cycle does
Sleep Cycle is a sleep tracker and smart alarm. It listens to your night (or uses motion) to estimate your sleep phases, then wakes you during a lighter phase within a window you choose. It runs on iPhone, iPad, Android and Apple Watch.
Sleep Cycle is the classic answer to "an app that tracks my sleep". You set a wake-up window, leave your phone by the bed, and it picks a moment when you seem to be sleeping lightly.
In the morning you get a graph of your night, plus notes on sounds like snoring or talking. Over time you can log things like caffeine or exercise and see trends.
Tracking and the alarm work without a wearable. Premium adds sleep sounds, stories, data export and Apple Health sync, plus an AI sleep coach.
Keep in mind that phone-based tracking is an estimate, not a medical test. It's most useful for spotting your own patterns over weeks, like how late nights or caffeine line up with how you feel in the morning.
Alternatives to Sleep Cycle
Who it's for
Skip it if: People who want medical sleep data. Anyone who won't keep a phone by the bed.
Pricing
Free planSleep Cycle is free to download with basic tracking. Premium comes with a free trial and costs around $39.99 a year; the App Store also lists other prices.
Prices can vary by country. Checked 19 Oct 2026.
What people like
- Works with only your phone
- Gentle smart alarm
- Long track record
- On iPhone and Android
Watch out for
- Many extras need Premium
- Phone-based tracking is an estimate
- Several different prices listed in the store
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Questions people ask
Does Sleep Cycle need a smartwatch?
No. It can track with your phone's microphone or motion. Apple Watch is optional.
Is Sleep Cycle free?
The tracker and alarm are free. Premium adds sounds, stories, export and more.
How does the smart alarm work?
You choose a wake-up window, and it tries to wake you when your sleep seems lightest within it.
Is it on Android?
Yes. It's on Google Play and the App Store.