# SleepCycle: Sleep Calculator

> Science-Based Sleep Optimizer

Canonical page: [https://chrome-stats.com/d/id6763971847](https://chrome-stats.com/d/id6763971847)

## Overview

- **ID:** `id6763971847`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** MARTHEN LUKAS LUMINGKEWAS
- **Category:** Lifestyle
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.0.8
- **Last updated:** 2026-05-19
- **First published:** 2026-05-18
- **Size:** 8.32 MB
- **Data as of:** 2026-09-24
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/sleepcycle-sleep-calculator/id6763971847)
- **Website:** [https://sleepcyclealarm.base44.app](https://sleepcyclealarm.base44.app/)
- **Privacy policy:** [https://sleepcyclealarm.base44.app/privacy](https://sleepcyclealarm.base44.app/privacy)

## Description

Wake up refreshed every morning. SleepCycle Calculator uses 90-minute sleep science to find your perfect bedtime and wake time — so you never feel groggy again.

SleepCycle Calculator helps you find the ideal time to go to sleep or wake up — based on real sleep science. Built around the 90-minute sleep cycle model, the app calculates optimal bedtimes and wake-up windows so you always rise at the lightest stage of sleep, feeling alert and refreshed.

WHETHER YOU SET A WAKE TIME OR SLEEP NOW
• Wake-Up Mode: Enter your desired wake-up time and the app calculates 4–6 ideal bedtimes working backwards in 90-minute cycles, plus a 14-minute fall-asleep buffer.
• Sleep Now Mode: Tap "Sleep Now" and the app instantly calculates your best wake-up times based on the current time.

BUILT-IN SMART ALARM
• Tap any suggested time to set it as your alarm instantly.
• Choose from 6 soothing alarm sounds: Gentle Bells, Forest Birds, Ocean Waves, Digital Beep, Soft Chime, and Cosmic Hum.
• Preview sounds before selecting.
• Dismiss or snooze (9 minutes) when the alarm fires.
• Push notifications ensure your alarm fires even when the app is in the background.

SLEEP HISTORY & TRACKING
• Every dismissed alarm automatically logs a sleep session — bedtime, wake time, duration, cycle count, and quality rating.
• View your sleep history on an interactive calendar with color-coded indicators.
• Track 7-day and 30-day sleep averages, your best night, and total nights logged.
• Weekly bar chart shows sleep duration at a glance.

SLEEP SCIENCE EDUCATION
• Learn what a sleep cycle really is and why timing matters.
• Explore the 4 sleep stages (N1, N2, N3, REM) with durations and biological functions.
• Understand the 90-minute rule and the 14-minute sleep onset latency formula used by this app.
• Science-backed sleep tips on room temperature, blue light, caffeine, and more.
• 7 tappable references to peer-reviewed sources including the Sleep Foundation, NIH, and Harvard Health.

BEAUTIFUL DESIGN
• Deep indigo night-sky aesthetic inspired by Apple's bedtime design language.
• Color-coded quality labels: Optimal, Great, Good, and Light for each sleep option.
• Smooth animations, haptic feedback, and a breathing moon animation for a calming experience.

SleepCycle Calculator is perfect for anyone who wants to stop waking up groggy and start waking up energized — backed by science, not guesswork.

Note: A medical disclaimer is included in the app. This app is not intended to diagnose or treat sleep disorders. For serious sleep concerns, please consult a healthcare professional.

PREMIUM ACCESS
Try SleepCycle Pro free for 14 days. After the trial, unlock full lifetime access for a one-time purchase of $19.99 — no subscription, ever. Premium features include personalized sleep insights, full history tracking, and all future updates.

## Rankings

- #906,042 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6763971847)