AutoSleep vs Pillow
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.
Pillow is a sleep tracking app for iPhone, iPad, and Apple Watch that automatically detects sleep cycles using motion and heart rate data, without requiring a separate wearable beyond an Apple Watch. It logs sleep duration and stages, then presents trend charts by week, month, and year alongside comparisons to steps, weight, and caffeine intake logged in Apple Health. A smart alarm wakes users during a lighter sleep stage within a chosen window instead of at a fixed hard time, and the app can record audio events like snoring or sleep talking overnight for playback. Pillow processes sleep analysis on-device and states that sleep data stays local to the user's devices rather than being uploaded to a server.
- 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
- No separate hardware required beyond an iPhone or Apple Watch already owned
- On-device processing with a clear no-data-selling privacy stance
- Smart alarm genuinely times wake-up around lighter sleep instead of a hard alarm
- Audio recording for snoring/sleep talk is a distinguishing feature versus many trackers
- 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
- Apple-only, so Android users cannot use it at all
- Full feature set requires a paid subscription; free tier is limited
- Accuracy of consumer motion/heart-rate-based sleep staging is inherently less precise than clinical sleep studies
More alternatives & similar tools
Alternatives to AutoSleep
View all →
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 Pillow
View all →A smart alarm and sleep tracker that analyzes sleep patterns and wakes you at the right moment.
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 purchase with fully automatic Apple Watch tracking and on‑device data, while Pillow is free to start but locks advanced features behind a subscription.
Key differences
- •Pricing model – AutoSleep is a single paid purchase; Pillow uses a freemium model with paid subscription for full features.
- •Hardware reliance – AutoSleep’s automatic tracking works only with an Apple Watch; Pillow can also use the iPhone alone.
- •Advanced metrics – AutoSleep provides SpO2, respiration rate, and wrist temperature on supported watches; Pillow does not list these metrics.
- •Audio recording – Pillow records snore and sleep‑talk audio; AutoSleep only offers a separate add‑on app for snore detection.
- •Smart alarm implementation – Both have smart alarms, but Pillow explicitly mentions timing within a chosen window, while AutoSleep’s description is less detailed.
Pricing & value
AutoSleep is a one‑time paid app; Pillow requires a subscription for full feature set after free tier.
Ease of use / learning curve
Pillow works automatically on iPhone or Watch with minimal setup; AutoSleep’s ‘sleep bank’ terminology adds learning overhead.
Features & depth
AutoSleep includes SpO2, respiration, wrist temperature, and HomeKit triggers not mentioned for Pillow.
Integrations & ecosystem
Both integrate with Apple Health; AutoSleep adds HomeKit, Pillow adds Siri.
Support
Both provide in‑app support and online help resources; no difference in availability.
Security & privacy
Both store data on‑device and state no cloud account or data selling; no distinction in facts.
Scalability / lock‑in
Pillow can run on iPhone alone, reducing hardware lock‑in; AutoSleep requires an Apple Watch for full automation.
Choose AutoSleep if…
Apple Watch owners who want a one‑time purchase and detailed physiological metrics.
Choose Pillow if…
Users who prefer a free start, may not own an Apple Watch, and value snore/audio recording.
Common questions
Does either app require a subscription for core sleep tracking?
AutoSleep is a one‑time paid app with no subscription; Pillow’s core tracking is free but advanced features need a paid subscription.
Can I use the app without an Apple Watch?
AutoSleep’s automatic tracking requires an Apple Watch; Pillow works on iPhone alone, though Apple Watch adds more data.
Which app provides more health metrics like SpO2 or respiration rate?
AutoSleep lists SpO2, respiration rate, and wrist temperature on supported Apple Watch models; Pillow does not list these metrics.