睡眠检测不准
根本没睡着，显示已经睡着好长时间。
手表 APP界面也不好看。
打算回顾一下刚才的记录的心率还得付费。
手表 APP界面也不好看。
打算回顾一下刚才的记录的心率还得付费。
Free
In-App Purchases
About
This app helps you optimize nap times by estimating sleep onset using heart rate and motion data from your watch. It learns your ideal nap duration and calculates the best time to lie down based on your fixed wake-up schedule. Track your naps and gain insights into your sleep patterns.
✓Estimates sleep onset from heart rate and motion
✓Calculates optimal lie-down time based on wake-up schedule
✓Learns nap duration from user history
✓Automatic nap recording
✓Heart rate and stillness data analysis
✓Backup notifications on watch and iPhone
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What's New in PowerNap
1.0.4
September 8, 2026
• Sleep-onset estimation now requires a sustained heart-rate drop as well as stillness. • Results and sleep-time totals reflect your answer about whether you slept. • View the heart-rate graph for your latest completed, non-cancelled nap without a purchase. • Improved Apple Watch readability and alarm reliability when sensor data is unavailable.
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Subscriptions & In-App Purchases
$4.99
PowerNap Pro
Personalized learning & detailed analytics
User reviews
Developer apps
FAQ
How does PowerNap estimate sleep onset?
PowerNap estimates sleep onset by analyzing a sustained heart-rate drop and continuous stillness detected by your watch. This data is processed on your device for privacy.
What are the benefits of PowerNap Pro?
PowerNap Pro, a one-time purchase, unlocks history-based nap duration suggestions, older heart-rate graphs, historical charts, and advanced insights. It also allows for optional waking before the scheduled alarm when your target sleep duration is met.
Does PowerNap have ads?
No, PowerNap is ad-free and designed with privacy in mind. It does not use tracking or require accounts, with purchases handled securely through Apple's StoreKit.
What devices is PowerNap compatible with?
PowerNap requires a watch running watchOS 10 or later, and it is compatible with both Apple Watch and iPhone.
How often is PowerNap updated?
The app was last updated on September 8, 2026, with version 1.0.4. This indicates a recent update, suggesting ongoing development and support.
Can PowerNap be used without a watch?
No, PowerNap relies on heart-rate data and motion from a compatible watch to estimate sleep onset. Without sufficient heart-rate data, the scheduled alarm will still function.
Is PowerNap a medical device?
No, PowerNap is not a medical device and is not intended to diagnose or treat any medical condition. Sleep onset is estimated for informational purposes.
How does PowerNap handle user data and privacy?
Nap, heart-rate, and assessment records are processed locally on your devices and are not sent to any servers. This ensures your data remains private and secure.
