AutoSleep vs Sleep Cycle
Side-by-side comparison of features, pricing, ratings, and alternatives.
AutoSleep is a sleep-tracking app for Apple Watch and iPhone that records sleep automatically in the background, without requiring the user to start or stop a session. It uses heart rate, motion, and (where available) blood oxygen and wrist temperature data to estimate sleep stages, sleep quality, and a running sleep debt total called the sleep bank. The app integrates with Apple Health and HomeKit, offers a smart alarm that wakes users during a lighter sleep phase, and includes an add-on companion app, AutoSnore, for snore detection. It is sold as a single one-time purchase on the App Store rather than a subscription, and processes data on-device rather than through a cloud account.
Sleep Cycle is a mobile app that uses phone sensors to track sleep duration, quality, and consistency, generating a nightly Sleep Score. Its Smart Alarm feature aims to wake users during a lighter sleep phase within a chosen time window for an easier morning, and the app also tracks snoring and long-term sleep trends.
- One-time purchase price with no ongoing subscription fees
- Fully automatic tracking that does not require remembering to start or stop a sleep session
- Detailed metrics including sleep stages, SpO2, respiration rate, and wrist temperature on supported hardware
- On-device processing with no account or login required for basic use
- Works using just a smartphone, no dedicated wearable required
- Smart Alarm feature is genuinely useful for gentler wake-ups
- Strong long-term trend tracking for sleep regularity
- Apple Watch integration adds standalone tracking and alarms
- Requires an Apple Watch for automatic tracking; iPhone-only use is far more limited
- Advanced metrics like SpO2 and respiration depend on specific newer Apple Watch models
- Interface and terminology (sleep bank, sleep debt) have a learning curve for new users
- Full feature set requires a paid Premium subscription
- Phone-based tracking can be less precise than dedicated wearables
- Needs the phone on the bed or nearby all night, which some users dislike
More alternatives & similar tools
Alternatives to AutoSleep
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Automatic sleep tracker and smart alarm for iPhone and Apple Watch with snore and sleep-talk recording.
A smart alarm and sleep tracker that analyzes sleep patterns and wakes you at the right moment.
Alternatives to Sleep Cycle
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Automatic sleep tracking for Apple Watch with no buttons to press and no subscription.
Sleep and energy tracking app that predicts your daily energy schedule and sleep debt.
The Verdict
AI-generated from listing dataAutoSleep offers a one‑time, fully automatic Apple Watch‑only solution with on‑device processing, while Sleep Cycle provides a free app that works with just a phone and adds optional Apple Watch support but requires a subscription for full features.
Key differences
- •AutoSleep requires an Apple Watch for automatic tracking; Sleep Cycle can track with only a smartphone.
- •AutoSleep is a one‑time purchase with no subscription; Sleep Cycle is freemium and locks advanced features behind a paid tier.
- •AutoSleep records SpO2, respiration, and wrist temperature on supported watches; Sleep Cycle relies on phone sensors and offers snore detection via sound.
- •AutoSleep integrates directly with Apple Health and HomeKit; Sleep Cycle offers Apple Health sync but no HomeKit automation.
- •AutoSleep processes data on‑device with no cloud account; Sleep Cycle’s premium features use cloud services (implied by subscription).
Pricing & value
AutoSleep is a one‑time paid app; Sleep Cycle’s full feature set requires an ongoing Premium subscription.
Ease of use / learning curve
Sleep Cycle works out‑of‑the‑box with a phone; AutoSleep’s concepts like ‘sleep bank’ add learning overhead.
Features & depth
AutoSleep provides detailed metrics (sleep stages, SpO2, respiration, wrist temperature) on supported watches; Sleep Cycle offers fewer biometric metrics.
Integrations & ecosystem
AutoSleep integrates with Apple Health and HomeKit for automation; Sleep Cycle only mentions Apple Health sync.
Support
AutoSleep lists in‑app support and an online user guide; Sleep Cycle provides no specific support details.
Security & privacy
AutoSleep stores data on‑device with no cloud account required; Sleep Cycle’s premium features likely use cloud services.
Scalability / platform flexibility
Sleep Cycle works on any smartphone and optional watch; AutoSleep is limited to Apple Watch users.
Choose AutoSleep if…
Apple Watch owners who want detailed, on‑device sleep metrics without a subscription.
Choose Sleep Cycle if…
Users who prefer a free phone‑based tracker or need flexibility across devices, and accept a subscription for premium features.
Common questions
Do I need to buy a subscription for either app?
AutoSleep is a one‑time purchase with no subscription; Sleep Cycle offers basic features free but charges a Premium subscription for full functionality.
Can I track sleep without an Apple Watch?
AutoSleep requires an Apple Watch for automatic tracking; Sleep Cycle can track using only a smartphone, with optional Apple Watch support.
Which app stores my sleep data locally?
AutoSleep processes and stores data on‑device; Sleep Cycle’s premium features are cloud‑based (subscription implied).