# Sleep90 — The Better Way To Sleep

> Intelligent sleep calculator for optimal bedtimes and wake-up times. (iPhone/iPad app by RussellCorp, LLC.)

- Source: https://appshunter.io/ios/app/sleep90/id6745744363 (this page in markdown: same URL + `.md`)
- Developer: [RussellCorp, LLC](https://appshunter.io/developer/1803841364)
- Category: Health & Fitness, Lifestyle
- Price: Free
- Rating: 5.00/5 from 7 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.1 · 18 MB
- Languages: English
- Released: 2025-06-23
- Data updated: 2026-06-04
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/sleep90/id6745744363/reviews.md

## What is Sleep90?

Sleep90 – Smarter Sleep, Better Mornings

Have you ever gotten 8 hours of sleep and still felt exhausted? That's because 8 hours wakes you up in the middle of your deepest sleep stage. 

Wake up refreshed! Sleep90 is your intelligent sleep calculator, designed to help you find the perfect time to go to bed or wake up, based on natural sleep cycles. With a beautiful, easy-to-use interface, haptic feedback, and dark mode support, Sleep90 makes it simple to maximize your rest and start every day at your best.

Key Features:

- Calculate optimal bedtimes and wake-up times with a tap
- Personalize your experience with light and dark themes
- Enjoy smooth, tactile haptic feedback for every action
- Save your sleep preferences for quick access
- Modern, privacy-focused design

Whether you want to avoid morning grogginess or just get the most out of your sleep, Sleep90 helps you plan your nights for better days. Download now and take the guesswork out of a good night’s sleep!

All Sleep Data is kept on device to optimize privacy.

## Key features

- Calculate optimal bedtimes and wake-up times
- Personalize with light and dark themes
- Haptic feedback for actions
- Save sleep preferences
- Privacy-focused design

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/sleep90/id6745744363/reviews.md

### 5/5 — Worked Wonders

*2025-09-05*

Best sleep I’ve gotten. Only critique is that I woke up more sticky than usual, but I wouldn’t call that a problem.

### 5/5 — Sleep90’s advanced features!!!

*2025-07-03*

Sleep90 is the perfect app for getting the prime amount of sleep to maximize focus for the following day. Every ad that’s played really gets me in a good mood (if you know what I mean 😉). It really helps with the excessive overflow and leakage coming down from my thighs every morning. Thanks sleep90!!!

### 5/5 — Worked fine

*2025-06-26*

I woke up and my pants were sticky and wet. Not really sure what happened but no complaints

### 5/5 — Worked fine

*2025-06-24*

I woke up and my pants were sticky and wet. Not too sure why this happened.

### 5/5 — This App Is Amazing

*2025-06-23*

Changed my life, it’s genuinely helpful and I haven’t felt drowsy in days. Maybe add some alarm functionality tho.

## Frequently asked questions about Sleep90

### How does Sleep90 calculate optimal sleep times?

Sleep90 calculates optimal bedtimes and wake-up times by analyzing natural sleep cycles. It aims to wake you during lighter sleep stages to prevent grogginess.

### What devices is Sleep90 available on?

Sleep90 is currently available for iPhone and iPod devices. Future platform expansions may be considered.

### Is Sleep90 free to use?

Yes, Sleep90 is free to download and use. It is supported by advertisements.

### Does Sleep90 have ads?

Yes, Sleep90 contains advertisements. These ads help support the development and maintenance of the app.

### How often is Sleep90 updated?

The latest version, 1.2.1, was released on July 8, 2025. Updates are released periodically to improve functionality and address any issues.

### What is the age rating for Sleep90?

Sleep90 has an age rating of 4+, making it suitable for a wide range of users.

### How does Sleep90 protect user privacy?

Sleep90 is designed with privacy in mind, keeping all sleep data on the device. This minimizes data sharing and enhances user privacy.

### What makes Sleep90's interface user-friendly?

Sleep90 features a beautiful, easy-to-use interface with options for light and dark themes, along with smooth haptic feedback for a tactile experience.

## Version history (last 4 releases)

### 1.2.1 — 2025-07-08

Introduced scaling of the arc modal when users click on suggested times based off screen size.

### 1.2.0 — 2025-06-30

- Now stores the previously inputted time on loading of the app; and defaults to 6:30am for first-time opens.
- Created New Modal Showing more detailed info on sleep cycles, appears when clicking on a bed/wake time

### 1.0.1 — 2025-06-25

Minor Bug Fixes and Improvements

### 1.0 — 2025-06-23

No release notes.

## Apps similar to Sleep90

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Minimalist Meditation Timer](https://appshunter.io/ios/app/minimalist-meditation-timer/id6752839296) | 5.0 (1) | Free | Health & Fitness |
| [STELLAR BODIES](https://appshunter.io/ios/app/stellar-bodies/id938738825) | 5.0 (1) | Free | Health & Fitness |
| [Caffeine Tracking by RECaf](https://appshunter.io/ios/app/caffeine-tracking-by-recaf/id1384068352) | 4.0 (206) | Free | Health & Fitness |
| [Brown Noise: Sleep + Focus](https://appshunter.io/ios/app/brown-noise-sleep-plus-focus/id6455731315) | 5.0 (7) | Free | Health & Fitness |
| [WOTWF - Workout planner](https://appshunter.io/ios/app/wotwf-workout-planner/id1516994746) | — | Free | Health & Fitness |
| [Corrello: Daily Health Check](https://appshunter.io/ios/app/corrello-daily-health-check/id6742023537) | 4.0 (2) | Free | Health & Fitness |

---

*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 2026-06-04.*