# RemSleep - REM Sleep Alarm — Sleep cycle alarm & nap timer

> Sleep cycle alarm & nap timer (iPhone/iPad app by Mitsuo Watabe.)

- Source: https://appshunter.io/ios/app/remsleep-rem-sleep-alarm/id6801780115 (this page in markdown: same URL + `.md`)
- Developer: [Mitsuo Watabe](https://appshunter.io/developer/6788107915)
- Category: Health & Fitness, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 9 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2026-08-24
- Data updated: 2026-10-14

## What is RemSleep?

Wake up at the end of a sleep cycle, not in the middle of one.

Sleep runs in cycles of roughly 90 minutes, moving between lighter and deeper stages. Waking near the end of a cycle tends to feel easier than being pulled out of the middle of one.

RemSleep turns that idea into an alarm clock. Instead of picking a time and hoping for the best, you choose how many cycles you want — 7 hr 30 min is simply 90 minutes times five.


HOW IT WORKS

1. Use + and - to choose how long to sleep, one cycle at a time
2. Tap SET! to lock it in
3. Get into bed, then tap Good Night

Here's the part that matters: the countdown starts the moment you tap Good Night.

You don't have to decide "I'll be asleep by 11." If you end up going to bed later than planned, nothing breaks - the wake-up time is recalculated from when you actually tapped.


FEATURES

- Add or remove sleep in whole cycles. No fiddling with minutes.
- Cycle length is adjustable from 30 to 180 minutes. Cycles differ from person to person, so tune it to yours.
- Four alarm sounds - Beep, Bell, Marimba, Digital. Tap any of them to hear a preview.
- Snooze from 1 to 30 minutes.
- Rings even with the screen off and the ringer switch silenced.
- Monochrome design with no color clutter. At night it flips to a dark palette so nothing glares at you in a dark room.
- No account. No sign-up. No personal details asked for.


BEFORE YOU RELY ON IT

- Leave the app running while you sleep. Locking the screen is fine, but force-quitting it from the app switcher leaves only a backup notification.
- It runs through the night, so it uses more battery than usual. Charging overnight is recommended.
- Notification permission is required for the alarm.


ABOUT ADS

RemSleep is free. A banner ad appears at the bottom of the screen where you set your time.

There are no ads on the countdown screen or the alarm screen - nothing will be shown to you while you sleep or the moment you wake.

If you would rather not see ads at all, Remove Ads is available as a one-time purchase from Settings. Buy it once and it carries over to a new phone or a fresh install on the same Apple Account.


PLEASE NOTE

Sleep cycle length varies between people and changes night to night. RemSleep is not a medical device and does not measure your sleep. If you have concerns about your sleep or health, please talk to a healthcare professional.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 広告を消す | $2.99 | one-time |


## Is RemSleep safe?

Not enough ratings yet to assess RemSleep.

## Is RemSleep legit?

RemSleep - REM Sleep Alarm appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for RemSleep is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.5 — 2026-09-20

• Minor visual refinements.

### 1.4 — 2026-09-15

• **Sleep music.** When you go to sleep (or start a nap), soft music plays and gently fades out after about 20 minutes. It always stops 2 minutes before your alarm.
• Turn it on or off and preview it in Settings.

### 1.3 — 2026-09-14

• **Nap mode.** Right after launch you can set a single short sleep of 5 to 30 minutes.
• On launch the app now shows just the current time. Pick a cycle and it switches to your wake-up time.
• The time keeps up with the clock even if you leave the app open.
• Refined typography and bouncier button animations.

### 1.2 — 2026-09-07

• Siri and Shortcuts support. Say "Start RemSleep" to begin your countdown, or "Start RemSleep for 5 cycles" to choose the length.
• The clock icon has been redrawn as an alarm clock, and its hands follow the current time.
• Cleaner spacing around the wake-up time.
• The − button now swirls away when you are already at the shortest setting.

### 1.1 — 2026-09-03

• Added Korean, Simplified Chinese and Traditional Chinese.
• The wake-up time turns blue when you set 7 hours or more.
• Added motion to the + and − buttons.
• After SET!, the screen shifts to a night palette so it is easier on your eyes in a dark room.

## Apps similar to RemSleep

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [NapSense](https://appshunter.io/ios/app/napsense/id6751795511) | — | Free | Health & Fitness |
| [Sleep Cycle Simple Calculator](https://appshunter.io/ios/app/sleep-cycle-simple-calculator/id6756280217) | — | Free | Health & Fitness |
| [Lucid Dream Alarm - Everdream](https://appshunter.io/ios/app/lucid-dream-alarm-everdream/id1553743004) | 4.2 (54) | Free | Health & Fitness |
| [Fiber Tracker: Healthy Gut](https://appshunter.io/ios/app/fiber-tracker-healthy-gut/id6503245293) | 3.4 (12) | Free | Health & Fitness |
| [Get Moving! Healthy Reminders](https://appshunter.io/ios/app/get-moving-healthy-reminders/id6445936204) | 4.9 (15) | Free | Health & Fitness |
| [Sunrise Alarm Clock  -](https://appshunter.io/ios/app/sunrise-alarm-clock/id6499276780) | 3.9 (37) | Free | Health & Fitness |

## More apps by Mitsuo Watabe

- [忘却曲線](https://appshunter.io/ios/app/id6799765993)
- [memomem: Voice Memo & Journal](https://appshunter.io/ios/app/memomem-voice-memo-and-journal/id6817113076)
- [計算ラボ](https://appshunter.io/ios/app/id6821185665)

All apps by Mitsuo Watabe: https://appshunter.io/developer/6788107915

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-14.*