# Sleep Time Calculator

> Get the sleep you deserve

Canonical page: [https://chrome-stats.com/d/id606077861](https://chrome-stats.com/d/id606077861)

## Overview

- **ID:** `id606077861`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Recked Software LLC
- **Category:** Utilities
- **Rating:** 3.80 / 5 (23 ratings)
- **Version:** 2.0.1
- **Last updated:** 2017-11-07
- **First published:** 2013-02-26
- **Size:** 55 MB
- **Data as of:** 2026-09-22
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/sleep-time-calculator/id606077861)
- **Website:** [https://madewithmustard.com/sleepcalculator](https://madewithmustard.com/sleepcalculator)

## Description

Know the best possible times to wake up with this free app.

The five stages of sleep, including their repetition, occur cyclically. The first cycle, which ends after the completion of the first REM stage, usually lasts for 90 minutes.

With 8 hours of sleep you typically go through 4-5 cycles a night.  Waking up in the middle of a cycle leaves you feeling groggy, but waking up at the end of a cycle leaves you feeling awake and alert.  This app gives you recommendations on when to wake up in the morning to decrease the likelihood that you will feel groggy.

## Rankings

- #254,117 — Overall

## Review summary

Users praise the app for its simplicity, free access, and sleep-cycle based bedtimes with reminders, plus usefulness for naps and irregular schedules. Recurrent drawbacks include nonworking wake-time setup, persistent UI banners and update issues, a perceived heavy subscription model, long startup splash screens, and limited customization (sleep time options) with unclear total sleep time display.

### Pros

- Simple and easy to use
- Free to use / no unnecessary bells and whistles
- Predicts bedtimes using sleep-cycle timing
- Includes a reminder to go to bed
- Useful for naps and variable schedules (e.g., shift work)

### Cons

- Wake-up time feature often doesn’t work / can’t set wake time
- UI issues: when editing times, the banner stays/persists and updates are not reflected
- Subscription pricing referenced (perceived as expensive)
- Long splash screens on startup delaying access
- Limited customization options (no ability to adjust sleep time to fall asleep or number of cycles) / total sleep time not clearly shown

## Similar extensions and apps

- [sleeptimes](https://chrome-stats.com/d/id6758449726)
- [Healthy Sleep Cycles](https://chrome-stats.com/d/id6758613952)
- [Sleep Calculator App](https://chrome-stats.com/d/id1608356513) — 3.00 / 5
- [Sleep Calculator Pro](https://chrome-stats.com/d/id1416795317) — 5.00 / 5
- [Good Time — Sleep Calculator](https://chrome-stats.com/d/id1510846801) — 3.60 / 5
- [SleepCycle: Sleep Calculator](https://chrome-stats.com/d/id6763971847) — 5.00 / 5
- [Smart Sleep Calculator](https://chrome-stats.com/d/id6744327999)
- [SleepCalcuator](https://chrome-stats.com/d/id6747623806)
- [Sleep Calculator Plus](https://chrome-stats.com/d/id6741904327) — 4.80 / 5
- [Sleep Calculator: Cycle Alarm](https://chrome-stats.com/d/id6747650151) — 5.00 / 5
- [Sleep Calculator - Sleeptally](https://chrome-stats.com/d/id6759725242)
- [Sleep Calculator - SleepCal](https://chrome-stats.com/d/id6757147036)

---

Source: [Chrome-Stats](https://chrome-stats.com/d/id606077861)