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Sleep Tracking · Updated 2026-04-29

Sleep Cycle Review (2026)

Phone-only sleep tracker with a smart alarm that actually works.

8.2 / 10
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Portrait of Dr. Anika ChandraWritten byDr. Anika ChandraSleep Science Editor, PhD, Behavioral Sleep MedicinePortrait of Daniel VanceReviewed byDaniel VanceEditor-in-Chief, MS, Health Informatics
Published
Updated
Peer-reviewed

Sleep Cycle has been the default phone-only sleep tracker for over a decade. It still is — particularly for the smart alarm, which remains best-in-class.

See sleep tracking rankings.

What are the pros and cons of Sleep Cycle?

What we love

  • No wearable needed
  • Smart alarm reliably wakes you in light sleep
  • Established and stable

What we don't

  • Stage accuracy below wrist-worn options
  • Some features feel old

How much does Sleep Cycle cost and what is included?

Free
$0
Basic tracking + smart alarm
Premium
$39.99/year
Trends, snore detection, online backup, integrations

Should you use Sleep Cycle? Our recommendation

Use Sleep Cycle if you…

  • Don't own a wearable
  • Specifically want a smart alarm

Skip Sleep Cycle if you…

  • Want lab-grade stage detection — get an Apple Watch + AutoSleep

What are the best alternatives to Sleep Cycle?

AutoSleep

Better accuracy if you have an Apple Watch.

Read the AutoSleep review →
Pillow

Similar phone-only option on iOS.

Read the Pillow review →
SleepScore

Phone-only sonar-based alternative.

Read the SleepScore review →

Frequently asked questions

Does the Sleep Cycle smart alarm work?
Yes — it's the most reliable smart alarm we tested. Set a 30-minute window and it'll wake you in light sleep within it.