# SleepTank > Sleep tracker forecasting alertness based on cumulative sleep history. (iPhone/iPad app by Institutes for Behavior Resources, Inc..) - Source: https://appshunter.io/ios/app/sleeptank/id1523726028 (this page in markdown: same URL + `.md`) - Developer: [Institutes for Behavior Resources, Inc.](https://appshunter.io/developer/1523726030) - Category: Health & Fitness - Price: Free - Rating: 4.33/5 from 3 App Store ratings - Age rating: 4+ - Requires: iOS 10.0 · 33 MB - Languages: English - Released: 2020-12-22 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/sleeptank/id1523726028/reviews.md ## What is SleepTank? SleepTank™ allows you to monitor how sleep fuels your alertness. Track your sleep over time -- not just how you slept last night—using the SleepTank™ • Forecast the impact of prior sleep history on future alertness • Reflects the cumulative quantity and quality of ALL prior sleep • Calibrated to your individual sleep goal Proactively plan sleep to improve alertness • Visualize when alertness will become seriously impaired • Plan when to go to bed to restore alertness • Plan the length and timing of naps • Visualize how a nap will extend alertness Visualizes the SleepTank™ History to see Trends in Sleep Health Ideal app for workers planning sleep to be alert on the job, such as shift workers, airline pilots, and emergency workers. Works with all Fitbit wearables with sleep scoring + heart rate. ## Key features - Forecast future alertness based on sleep history - Track cumulative sleep quantity and quality - Calibrated to individual sleep goals - Plan sleep to improve alertness - Visualize alertness impairment - Plan naps for extended alertness - Visualize sleep trends ## Frequently asked questions about SleepTank ### What is SleepTank? SleepTank is a health and fitness app designed to monitor how your sleep history impacts your alertness. It forecasts future alertness levels and helps you plan sleep and naps to optimize your performance. ### How does SleepTank forecast alertness? SleepTank forecasts alertness by reflecting the cumulative quantity and quality of all your prior sleep, calibrated to your individual sleep goal. It visualizes when alertness may become impaired and when to go to bed to restore it. ### Can SleepTank help with naps? Yes, SleepTank allows you to plan the length and timing of naps. It can also visualize how a nap will extend your alertness, helping you make the most of short rest periods. ### What devices does SleepTank support? SleepTank works with all Fitbit wearables that provide sleep scoring and heart rate data. It is also available on iPhone, iPad, and iPod devices. ### Is SleepTank suitable for shift workers? SleepTank is ideal for workers planning sleep to be alert on the job, such as shift workers, airline pilots, and emergency workers. It helps manage sleep for demanding schedules. ### How often is SleepTank updated? The latest version of SleepTank is 1.62, which was last updated on November 10, 2022. This indicates a relatively consistent update schedule from the developer. ### What is the age rating for SleepTank? SleepTank has an age rating of 4+, making it suitable for a wide range of users. This suggests the content is generally appropriate for most audiences. ### Does SleepTank have ads? No, SleepTank is ad-free. The app does not contain advertisements, providing an uninterrupted user experience. ## Version history (last 5 releases) ### 1.62 — 2022-11-10 Minor Updates to the UI. ### 1.57 — 2022-07-19 Minor Updates to the UI. New feature to initiate account deletion for user accounts. ### 1.51 — 2022-05-30 Minor Updates to the UI. ### 1.44 — 2022-03-23 - Minor user interface improvements. ### 1.42 — 2022-03-08 - Minor user interface improvements ## Apps similar to SleepTank | App | Rating | Price | Category | | --- | --- | --- | --- | | [Happie - Smile Therapy :)](https://appshunter.io/ios/app/happie-smile-therapy/id1579204161) | 5.0 (9) | Free | Health & Fitness | | [Umbrella Journal : Smart CBT](https://appshunter.io/ios/app/umbrella-journal-smart-cbt/id6447490753) | 3.0 (2) | Free | Health & Fitness | | [米迦健康-让爱你的人更安心](https://appshunter.io/ios/app/id1610731660) | — | Free | Health & Fitness | | [Inner Balance Physio & Pilates](https://appshunter.io/ios/app/inner-balance-physio-and-pilates/id1616681700) | — | Free | Health & Fitness | | [Dr Fiona Tassoni Fertility COH](https://appshunter.io/ios/app/dr-fiona-tassoni-fertility-coh/id1607693700) | — | Free | Health & Fitness | | [Clockwork-Pitt](https://appshunter.io/ios/app/clockwork-pitt/id1525942313) | 5.0 (1) | Free | Health & Fitness | ## More apps by Institutes for Behavior Resources, Inc. - [Zulu Data Extractor](https://appshunter.io/ios/app/zulu-data-extractor/id1556892315) - [SleepTank™](https://appshunter.io/ios/app/sleeptank/id6480587444) All apps by Institutes for Behavior Resources, Inc.: https://appshunter.io/developer/1523726030 --- *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 2026-06-10.*