# SleepCycle – Sleep Calculator
> Wake up refreshed. Optimal bedtime & wake-up time using sleep cycle science.
Canonical page: [https://chrome-stats.com/d/com.cosmic.sleepcycle](https://chrome-stats.com/d/com.cosmic.sleepcycle)
## Overview
- **ID:** `com.cosmic.sleepcycle`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Elegant
- **Category:** HEALTH\_AND\_FITNESS
- **Downloads:** 20
- **Version:** 1.4
- **Last updated:** 2026-06-09
- **First published:** 2026-05-30
- **Publisher country:** CN
- **Size:** 9.90 MB
- **Data as of:** 2026-09-06
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.cosmic.sleepcycle)
- **Privacy policy:** [https://deeplyelegant.github.io/sleepcycle\_privacy/privacy-policy.html](https://deeplyelegant.github.io/sleepcycle_privacy/privacy-policy.html)
## Description
### 🌙 Wake Up at the Perfect Moment
SleepCycle uses sleep cycle science to calculate your ideal bedtime or wake-up time. By waking at the end of a sleep cycle — rather than in the middle — you avoid grogginess and start every day feeling truly rested.
### ⏰ Two Simple Modes
- **Wake Up mode** — Tell us when you need to get up. We'll show you the best bedtimes, from the earliest to the latest, so you can pick what fits your evening.
- **Bedtime mode** — Tell us when you plan to go to sleep. We'll calculate the optimal wake-up times that align with your natural sleep cycles.
- **Now mode** — Going to bed right now? We'll instantly show your best wake-up times based on the current time.
### 🔬 The Science Behind It
Each sleep cycle lasts approximately 90 minutes. A full night of sleep consists of 4–6 complete cycles. Waking up at the end of a cycle — during your lightest sleep phase — leaves you feeling alert and energized, while waking mid-cycle causes that familiar "groggy" feeling known as sleep inertia.
SleepCycle calculates backwards (for bedtimes) or forwards (for wake-up times) using your personalized settings, so every recommendation is tailored to you.
### ⚙️ Fully Customizable
- Adjust the time it takes you to fall asleep (5–30 minutes)
- Set your average sleep cycle length (60–120 minutes)
- Choose how many cycles to display
- All preferences are saved automatically
### 🎨 Beautiful & Personal
- **Three theme modes** — Light, Dark, or Follow System
- Clean, gradient-driven design that's easy on the eyes
- Minimal interface — no clutter, just what you need
- Works perfectly with Android's Material You dynamic theming
### 🌍 Multi-Language Support
SleepCycle speaks your language. Fully localized into English, 中文, Español, Français, Deutsch, 日本語, 한국어, Português, Русский, العربية, and हिन्दी.
### 🔒 Privacy First
No accounts required. Your sleep data stays on your device, always. We use anonymous analytics to improve the app — learn more in our Privacy Policy.
### ✅ What You Get
- Instant sleep cycle calculations
- Recommended cycle highlighted for each scenario
- Bedtime and wake-up time suggestions
- Customizable sleep parameters
- Clean, beautiful dark and light themes
- Eleven language options
- Anonymous usage analytics to improve the app experience
SleepCycle helps you work with your body's natural rhythm — not against it.
## Rankings
- #2,585,319 — Overall
## Permissions and access
### Permissions
- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.WAKE_LOCK`
- `com.android.alarm.permission.SET_ALARM`
- `com.android.vending.CHECK_LICENSE`
- `com.cosmic.sleepcycle.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.google.android.gms.permission.AD_ID`
## Similar extensions and apps
- [Sleep Cycle](https://chrome-stats.com/d/com.koasac.sleepcycle) — 2 users
- [Sleep Calculator](https://chrome-stats.com/d/com.sleep.calculator) — 2 users
- [DreamCycle](https://chrome-stats.com/d/com.lumako.dreamcycle) — 13 users
- [Sleep Cycle](https://chrome-stats.com/d/com.slcyc.sleepcycle) — 181 users
- [Sleep Calculator](https://chrome-stats.com/d/sleepcycles.bedtimecalculator.sleepcalculator) — 138 users
- [SleepSync](https://chrome-stats.com/d/com.app.sleepcyclecalculatorapp351584) — 16 users
- [Sleep Cycle Calculator](https://chrome-stats.com/d/com.pentarab.sleepdial) — 19 users
- [Sleep Calculator - Sloth](https://chrome-stats.com/d/com.chromiumone.sleepcalculatorapp) — 30 users
- [REMtime - Sleep Cycle Timer](https://chrome-stats.com/d/com.remtime) — 385 users
- [Bedtime Alarm Calculator](https://chrome-stats.com/d/net.appcolors.bedtime_alarm_calculator) — 21 users
- [Calculadora de Ciclo do Sono](https://chrome-stats.com/d/com.fihane.app) — 7 users
- [Calculateur de sommeil](https://chrome-stats.com/d/com.broyz.calculateurdesommeil) — 16 users
---
Source: [Chrome-Stats](https://chrome-stats.com/d/com.cosmic.sleepcycle)