PowerNap

Most nap apps start a timer the moment you press start — but you're not asleep yet.

PowerNap is different. It detects when you actually fall asleep, then starts the real countdown from that moment. Wake up refreshed, not groggy.

No ads, no subscription, onetime purchase.

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HOW IT WORKS
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① Set your maximum nap duration — this is your safety net. You'll always wake up on time, no matter what.

② Lie down and tap Start. PowerNap begins monitoring in the background.

③ It detects when you fall asleep using your phone's motion sensor and (optionally) your smartwatch's heart rate.

④ Once asleep, the real nap timer starts. PowerNap wakes you during light sleep — the moment when waking feels most natural and effortless.


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SMART SLEEP DETECTION
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With a paired Wear OS smartwatch:
PowerNap reads your heart rate in real time. When your heart rate drops and movement stops, it knows you're asleep. It then monitors your sleep cycle and wakes you precisely when you transition back into light sleep — just like waking up naturally.

Without a smartwatch:
PowerNap uses your phone's accelerometer to track movement. It waits at least 5 minutes (the average time to fall asleep), then extends that offset if you're still moving. Only once you've been still for a sustained period does it start your nap timer. No false positives, no premature alarms.


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FEATURES
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⌚ Wear OS companion app
Stream live heart rate from your smartwatch for precise sleep stage detection. The watch displays your current sleep stage and wakes you with a custom haptic pattern.

💤 Light sleep wake-up
Waking from light sleep feels completely different from waking from deep sleep — like you woke up on your own. PowerNap targets this window so you never feel groggy.

⏱ Flexible duration
Set any max duration from 10 to 60 minutes. The smart detection works within whatever window you choose.

🔔 Alarm sound picker
Choose from three built-in gentle tones — a soft chime, morning birdsong, or a singing bowl — or pick any ringtone from your device.

📊 Nap history
Review your last 50 nap sessions. See how long it took to fall asleep and how long you actually slept.

🔒 Fully private
All data stays on your device. No account required. No cloud sync. No analytics. Ever.

💰 One-time purchase — no subscription
Pay once, own it forever. No recurring fees, no paywalled features, no ads. Everything in the app is included from day one.

⚡ Battery friendly
The background service is optimized to minimize battery drain. The watch companion streams data efficiently and stops automatically when your nap ends.


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PERMISSIONS EXPLAINED
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PowerNap requests only what it needs — motion detection, body sensors (smartwatch HR), notifications for the active session, and alarm scheduling to guarantee your alarm fires. Nothing else.


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TIPS FOR BEST RESULTS
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→ Place your phone face-down on a flat surface near you, or in a pocket
→ Wear your Wear OS watch during the nap for the most accurate detection
→ Set a max duration that gives you a comfortable buffer — 30 min is ideal


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WEAR OS COMPANION
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Install the PowerNap Wear OS app on your watch for the full experience. The watch app starts automatically when you begin a nap on your phone, streams heart rate data, shows your current sleep stage, and delivers a gentle haptic alarm directly on your wrist.


Nap smarter. Wake refreshed. 🌙