Real sleep detection
Heart rate, wrist movement and an on-wrist check work together, so lying still awake or a watch on the nightstand never counts as sleep.
For Galaxy Watch & Wear OS
The nap alarm that never fails.
Power Napper notices when you actually fall asleep, then wakes you after the sleep you asked for, not after you lay down.
Coming soon to Google Play · Wear OS 5 and newer · 3 naps free, no subscription
A timer starts when you lie down.
Power Napper starts when you fall asleep.
Set a 20-minute timer and take 12 minutes to drift off, and you get 8 minutes of sleep. Power Napper gives you the full 20.
A regular timer
Counts from the moment you tap it. Fall asleep late and it cuts your nap short; fall asleep fast and you may wake groggy.
Power Napper
Waits until your heart rate settles and your wrist is still, then counts down your real sleep. A backup alarm wakes you even if you never drift off.
How it works
Three steps, all on your wrist
-
1Pick your nap
Tap 10, 20 or 30 minutes, or set any length up to 8 hours.
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2Drift off
Lie back. The countdown starts when Power Napper detects you are asleep.
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3Wake up gently
Vibration builds from soft to strong. A sound plays only if you need it.
Features
Built to wake you, every single time
Gentle, then firm
Vibration steps up over a minute. If you are still asleep, your watch's alarm sound fades in. Snooze is one big tap.
A backup alarm, always
Set the moment you start, so you are woken even if sleep is never detected. Choose how long it waits on custom naps.
Nap tracking
See how long you slept and how fast you fell asleep, a weekly chart, your streak, and a heart-rate graph for every nap.
One-tap tile and complication
Start a nap straight from your tiles or a watch face complication that shows the minutes left.
Works when it counts
With the screen off, in battery saver, after a crash and even after your watch restarts mid-nap.
Find your best nap
Rate how you feel. Power Napper learns what works for you.
- One tap after waking: groggy, okay or refreshed.
- After five rated naps, it suggests the length and time of day that leave you best.
- Start that nap again with one tap from the home screen.
Your data never leaves your watch.
Your heart rate, movement and nap history are processed and stored on the watch, and nowhere else. We have no servers to send them to.
- No account
- No ads
- No tracking
- No phone needed
Compatibility
Works on Wear OS 5 and newer
Google Play shows the Install button only on watches that can run it.
| Watch | Notes |
|---|---|
| Samsung Galaxy Watch 4, 5, 6, 7, 8, FE and Ultra (incl. Classic and Pro) | Updated to Wear OS 5 or 6 |
| Google Pixel Watch 2, 3 and 4 | Wear OS 6 |
| OnePlus Watch 2 and 3 | Wear OS 5 |
| Other watches on Wear OS 5 or newer | Check Google Play on your watch |
Not available for Apple Watch, or for Wear OS 3 and 4 watches.
Pricing
Try it free. Buy it once.
Free trial
$0
Your first 3 naps, every feature.
- Sleep detection and gentle wake
- Backup alarm and snooze
- Nap history and charts
Full unlock
$4.99 once
Unlimited naps, forever. $2.99 for the first two weeks after launch.
- Everything in the trial, unlimited
- Best-nap insights
- No subscription, no ads, no account
FAQ
Questions, answered
Is there a Galaxy Watch app that wakes you up after you fall asleep?
Yes. Power Napper is a Wear OS app for Galaxy Watch 4 and newer that watches your heart rate and movement, detects when you fall asleep, and starts your nap countdown at that moment, so a 20-minute nap means 20 minutes of actual sleep.
How does Power Napper know when I fall asleep?
It measures your heart rate after you settle in, then looks for a few minutes where your wrist is still and your heart rate is clearly below that level. That is when the countdown starts. If your watch is off your wrist, it never counts that as sleep.
What if it doesn't detect that I fell asleep?
A backup alarm always wakes you. For one-tap naps it rings 20 minutes after your nap length; for custom naps you choose the backup time, from 5 minutes to 2 hours.
Do I need my phone?
No. Power Napper runs entirely on the watch. You can install it from Google Play on your watch or from your phone.
Which watches does Power Napper work with?
Wear OS 5 or newer: Samsung Galaxy Watch 4 and newer, Google Pixel Watch 2, 3 and 4, OnePlus Watch 2 and 3, and other current Wear OS watches. It does not run on Apple Watch.
Is there a subscription?
No. Your first 3 naps are free with every feature. After that, a single $4.99 purchase unlocks the app for good. No subscription, no ads, no account.
Is my heart rate data private?
Yes. Your heart rate, movement and nap history are processed and stored only on your watch. Nothing is sent to us or anyone else. Read the privacy policy.
How long should a power nap be?
Many people find 10 to 20 minutes of sleep refreshing without grogginess. Power Napper lets you rate how you feel after each nap and, after five rated naps, shows the length and time of day that work best for you.
Is Power Napper a medical device?
No. Power Napper is a nap alarm. Its sleep detection is an estimate and it is not intended to diagnose or treat any condition.
Be first to nap smarter.
Join the waitlist and we'll email you once when Power Napper is on Google Play, with the launch price.
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