Sleep Cycle

AI sleep tracker with sound-based analysis, a smart alarm that wakes you in light sleep, and an AI coach.

Freemium Lifestyle
Visit Website ↗ by Sleep Cycle AB

What is Sleep Cycle?

Sleep Cycle is the pioneer of smartphone-based sleep tracking, analyzing sounds overnight to estimate sleep stages, snoring, coughing and sleep talking — no wearable required. Its signature smart alarm wakes you during your lightest sleep phase within a chosen window to reduce morning grogginess. In 2026 the company shipped Luma, an AI sleep coach, plus an updated Sleep Quality Score, and began clinical validation of AI-based sleep apnea detection.

Key features

  • Sound-based sleep analysis via phone microphone
  • Smart alarm waking you in light sleep within a 30-minute window
  • Snore, cough and sleep-talk detection with audio recordings
  • Luma AI sleep coach (launched 2026)
  • Sleep Quality Score and long-term trend analysis
  • Sleep stories, meditations and relaxing sounds
  • Apple Watch and Apple Health integration
  • AI-based sleep apnea detection in clinical validation

Pros

  • Works without any wearable using just your phone
  • 15+ years of refinement with 40M+ downloads
  • Smart alarm is widely praised for gentler wake-ups
  • Actively investing in AI: sleep coach and apnea detection

Cons

  • Sleep-stage accuracy has been questioned in independent tests
  • Free tier is quite limited; premium history and trends cost extra
  • Phone-only tracking is less accurate than watch-based tracking

Sleep Cycle at a glance

PricingFreemium
CategoryLifestyle
Platformsios, android
CompanySleep Cycle AB
Official websitewww.sleepcycle.com
sleepsleep-trackersmart-alarmsnore-detectionai-coachsleep-stageswearable-freesleep-apnea

How to choose the right Lifestyle tool

Lifestyle tools succeed when they quietly fit into daily routines — planning, health, finance, home and personal organisation. Ease of use is the main feature: if a tool needs ten minutes of setup every day, it will not survive the month, so favour fast input, good mobile apps and helpful reminders over long feature lists. Because these tools often hold personal information, read the privacy basics: what is collected, whether it is sold or shared, and whether you can export or delete your data. Free tiers are common in this category, so test two or three finalists with your real routine for a week each. The right choice is the one you are still using on day thirty.

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Sleep Cycle FAQs

What is Sleep Cycle?

Sleep Cycle is the pioneer of smartphone-based sleep tracking, analyzing sounds overnight to estimate sleep stages, snoring, coughing and sleep talking — no wearable required. Its signature smart alarm wakes you during your lightest sleep phase within a chosen window to reduce morning grogginess. In 2026 the company shipped Luma, an AI sleep coach, plus an updated Sleep Quality Score, and began clinical validation of AI-based sleep apnea detection.

What are the main features of Sleep Cycle?

Sleep Cycle offers Sound-based sleep analysis via phone microphone, Smart alarm waking you in light sleep within a 30-minute window, Snore, cough and sleep-talk detection with audio recordings, Luma AI sleep coach (launched 2026), Sleep Quality Score and long-term trend analysis, Sleep stories, meditations and relaxing sounds, Apple Watch and Apple Health integration and AI-based sleep apnea detection in clinical validation.

How much does Sleep Cycle cost?

Sleep Cycle follows a freemium model: a free tier is available, and paid plans unlock higher limits and advanced features. Check its official website for current plan prices.

What are the pros and cons of Sleep Cycle?

Strengths of Sleep Cycle include Works without any wearable using just your phone; 15+ years of refinement with 40M+ downloads; Smart alarm is widely praised for gentler wake-ups. On the downside, Sleep-stage accuracy has been questioned in independent tests; Free tier is quite limited; premium history and trends cost extra; Phone-only tracking is less accurate than watch-based tracking.