# Sleep Calculator Plus — Optimize sleep cycles > Calculates optimal sleep and wake times based on 90-minute sleep cycles. (iPhone/iPad app by Kevin Hausen.) - Source: https://appshunter.io/ios/app/sleep-calculator-plus/id6741904327 (this page in markdown: same URL + `.md`) - Developer: [Kevin Hausen](https://appshunter.io/developer/1794777127) - Category: Utilities - Price: Free - Rating: 5.00/5 from 14 App Store ratings - Age rating: 4+ - Requires: iOS 16.6 · 1 MB - Languages: German (Germany) - Released: 2025-02-13 - Data updated: 2026-08-27 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/sleep-calculator-plus/id6741904327/reviews.md ## What is Sleep Calculator Plus? Sleep Calculator Plus - Find Your Perfect Sleep Time Tired of being tired? Sleep Calculator helps you find the ideal time to go to bed or wake up! Our brains move through natural 90-minute sleep cycles. Sleep Calculator helps you wake up between these cycles - so you start your day feeling refreshed and energized! KEY FEATURES: - Calculate the optimal bedtime for your desired wake-up time - Find the best wake-up times if you are going to bed now - Simple and intuitive interface - Supports both 12 and 24-hour formats - Elegant dark design for nighttime use - No ads, no in-app purchases HOW IT WORKS: Sleep Calculator Plus factors in that you need about 15 minutes to fall asleep and then calculates several ideal sleep times based on complete sleep cycles. Choose the time that best fits your daily schedule! Whether you are an early bird or a night owl - Sleep Calculator Plus helps you wake up at the right time and say goodbye to grogginess! Pro tip: Look for the "Suggested" times - these are especially recommended for a refreshing sleep! Download Sleep Calculator Plus now and discover what being well-rested really feels like! ## Key features - Calculate optimal bedtime - Find best wake-up times - Supports 12/24 hour formats - Intuitive interface - Dark design for nighttime - No ads or in-app purchases ## Frequently asked questions about Sleep Calculator Plus ### How does Sleep Calculator Plus work? Sleep Calculator Plus factors in approximately 15 minutes to fall asleep and then calculates ideal sleep times based on complete 90-minute sleep cycles. It suggests optimal bedtimes for a desired wake-up time or the best wake-up times if you are going to bed now. ### What is the optimal sleep cycle length used by Sleep Calculator Plus? Sleep Calculator Plus is based on the principle of natural 90-minute sleep cycles. The app helps users wake up between these cycles to promote a feeling of being refreshed. ### Does Sleep Calculator Plus have ads? No, Sleep Calculator Plus is ad-free. The app explicitly states 'No ads, no in-app purchases' in its features list. ### On which devices can I use Sleep Calculator Plus? Sleep Calculator Plus is available for iPhone and iPad. The app supports both devices, indicated by its platform compatibility. ### What is the age rating for Sleep Calculator Plus? Sleep Calculator Plus has an age rating of 4+. This indicates it is suitable for children and adults. ### How often is Sleep Calculator Plus updated? Sleep Calculator Plus was last updated on February 13, 2025, with version 1.1. This suggests recent development and maintenance. ### What makes Sleep Calculator Plus stand out? Users often appreciate the simple and intuitive interface, along with an elegant dark design for nighttime use. The 'Suggested' times are also highlighted as particularly recommended for a refreshing sleep. ### Is Sleep Calculator Plus free to download and use? Yes, Sleep Calculator Plus is available for free. The app's pricing is listed as 'Free' and it does not feature in-app purchases. ## Version history (last 2 releases) ### 1.1 — 2025-02-13 Bugfixes and stability improvements ### 1.0 — 2025-02-13 No release notes. ## Apps similar to Sleep Calculator Plus | App | Rating | Price | Category | | --- | --- | --- | --- | | [Find Bluetooth Device: Tracker](https://appshunter.io/ios/app/find-bluetooth-device-tracker/id6741841945) | 4.2 (43) | Free | Utilities | | [Verivo: Get Temporary SMS Code](https://appshunter.io/ios/app/verivo-get-temporary-sms-code/id6740342022) | 4.2 (54) | Free | Utilities | | [Air Tracker, Device Detector.](https://appshunter.io/ios/app/air-tracker-device-detector/id6739254297) | 4.6 (70) | Free | Utilities | | [QR Code Reader: Price Scan App](https://appshunter.io/ios/app/qr-code-reader-price-scan-app/id6742537481) | 4.6 (34) | Free | Utilities | | [Voice Clone: Changer Song AI](https://appshunter.io/ios/app/voice-clone-changer-song-ai/id6741868996) | 3.9 (11) | Free | Utilities | | [Sleep Time - Alarm Calculator](https://appshunter.io/ios/app/sleep-time-alarm-calculator/id6502281177) | 4.5 (6) | Free | Utilities | ## More apps by Kevin Hausen - [Truth or Dare? Party & Couple](https://appshunter.io/ios/app/truth-or-dare-party-and-couple/id1644670826) - [Trading Journal: AlphaTrades](https://appshunter.io/ios/app/trading-journal-alphatrades/id6474116218) - [Workout Rest Timer Plus](https://appshunter.io/ios/app/workout-rest-timer-plus/id6741588247) - [Spider Identifier: Spider AI](https://appshunter.io/ios/app/spider-identifier-spider-ai/id6747262226) - [Tree Identifier: Tree AI](https://appshunter.io/ios/app/tree-identifier-tree-ai/id6747577038) All apps by Kevin Hausen: https://appshunter.io/developer/1794777127 ## Related topics [sleep calculator plus](https://appshunter.io/ios/topics/sleep-calculator-plus) · [sleep calculator](https://appshunter.io/ios/topics/sleep-calculator) · [free sleep calculator](https://appshunter.io/ios/topics/free-sleep-calculator) · [sleep calculator pro](https://appshunter.io/ios/topics/sleep-calculator-pro) · [sleep calculator app](https://appshunter.io/ios/topics/sleep-calculator-app) · [sleepytime calculator](https://appshunter.io/ios/topics/sleepytime-calculator) --- *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 2026-08-27.*