# PowerNap: Nap Timer & Alarm

> Learns your perfect nap length

Canonical page: [https://chrome-stats.com/d/id6787592785](https://chrome-stats.com/d/id6787592785)

## Overview

- **ID:** `id6787592785`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** RUMAHSAKU CORP.
- **Category:** Health & Fitness
- **Version:** 1.0.4
- **Last updated:** 2026-09-08
- **First published:** 2026-07-08
- **Size:** 9.86 MB
- **Data as of:** 2026-09-09
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/powernap-nap-timer-alarm/id6787592785)
- **Website:** [https://powernap.tangowrist.com/](https://powernap.tangowrist.com/)
- **Privacy policy:** [https://powernap.tangowrist.com/privacy-policy.html](https://powernap.tangowrist.com/privacy-policy.html)

## Description

Your lunch break ends at a fixed time. So the real question isn't "how long should I nap" — it's "by when should I lie down?"

PowerNap is a nap timer built around the watch on your wrist. It estimates sleep onset from heart rate and motion. It starts with a standard 15-minute suggestion. After 5 valid assessments, it uses your history to suggest a duration from 10 to 20 minutes and works backwards from your fixed wake-up time to tell you when to lie down.

HOW IT WORKS
1. Set your wake-up time (e.g. 12:55)
2. Lie down by the suggested time and tap Start Nap on your watch
3. Heart rate + stillness estimate sleep onset — no tapping needed
4. Confirm whether you slept and rate grogginess, then rate return-to-work readiness about 30 minutes later
After 5 assessed naps, history-based suggestions begin.

MADE FOR YOUR WRIST
- PowerNap estimates sleep onset from a sustained heart-rate drop and continuously observed stillness. Resting while awake can still resemble sleep.
- Last night's sleep duration, resting heart rate and HRV shown as reference information
- Backup notifications on both watch and iPhone
- Without sufficient heart-rate data, no sleep estimate is made; the scheduled alarm still works.

TRACK AND UNDERSTAND
- Every nap recorded automatically: estimated onset and sleep duration, heart-rate curve
- Wake-up and 30-minute assessments, weekly charts and start-time patterns
- Insights based on your own answers and history
- The heart-rate graph for your latest completed, non-cancelled nap is included without a purchase. Access moves to the next completed nap; older graphs require Pro.
- Sleep totals and averages include estimates only when you confirm that you slept. No, unsure and unanswered records are excluded.

POWERNAP PRO (ONE-TIME PURCHASE)
A one-time Pro purchase unlocks history-based suggestions, older heart-rate graphs, history charts and insights. No subscription.
With Pro, optionally wake before the scheduled alarm when the estimated sleep duration reaches your target.

PRIVATE BY DESIGN
Nap, heart-rate and assessment records are processed on your devices and are not sent to our servers. No ads, tracking or accounts. Purchases communicate with Apple through StoreKit.

- Requires a watch running watchOS 10 or later
- PowerNap is not a medical device and is not intended to diagnose or treat any condition. Sleep onset is estimated from heart rate and motion.

## Rankings

- #2,129,746 — Overall

## Similar extensions and apps

- [NapBest](https://chrome-stats.com/d/id6760725859) — 3.00 / 5
- [PowNap](https://chrome-stats.com/d/id6743547737) — 5.00 / 5
- [NapSense](https://chrome-stats.com/d/id6751795511)
- [Power Nap Tracker: cycle timer](https://chrome-stats.com/d/id891618463) — 4.50 / 5
- [NapBoost](https://chrome-stats.com/d/id6760869553) — 3.00 / 5
- [Quick Power Nap Timer](https://chrome-stats.com/d/id6757683057)
- [Naplane](https://chrome-stats.com/d/id6777254550)
- [Nap Timer](https://chrome-stats.com/d/id1048910593) — 2.00 / 5
- [Zzzify - Nap Timer & Sleep](https://chrome-stats.com/d/id6755915310)
- [QuickNap!](https://chrome-stats.com/d/id6757171869)
- [Naptime - Power Nap assistant](https://chrome-stats.com/d/id1128614633) — 2.00 / 5
- [Nap Timer - Actual Sleep](https://chrome-stats.com/d/id6758032471)

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6787592785)