AutoSleep vs Strong

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.

Strong is a comprehensive workout tracking app that lets you log exercises, sets, reps, and weight with a clean, intuitive interface. It supports custom routines, progress charts, and automatic PR detection to keep you motivated. With over 3 million users, Strong syncs across iOS and Android devices, offers a web dashboard, and integrates with popular fitness devices, making it easy to plan, execute, and review every gym session.

• 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

• Intuitive tap‑based logging
• Automatic PR detection
• Cross‑device sync
• Robust export options

• 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

• Limited free features compared to premium
• No built‑in video tutorials
• No desktop native app