ReadiOne by Fatigue Science
Fatigue Science Health & Fitness iPhoneiPadiPod touch
ReadiOne by Fatigue Science is a free Health & Fitness app for iPhone and iPad by Fatigue Science. Rated 3.8/5 from 13 ratings. Requires iOS 15.0.
- Rating
- 3.8
- 13 ratings
- Price
- Free
- on the App Store
- Size
- 62 MB
- Age 4+
- Updated
- Sep 23
- 2026 · v4.6.7
Screenshots
About ReadiOne by Fatigue Science
ReadiOne is a personal application designed for operators or workers to visualize their realtime and future fatigue levels (ReadiScores) and timing of greatest fatigue risk exposure, ensuring that users are fit for duty during the shift ahead. ReadiOne uses the SAFTE biomathematical model to analyze your sleep in order to quantify and predict the impact it will have on your performance for the day ahead. Sleep can come from wearable data (ReadiWatch, Gamin, or Fitbit) or can be estimated by the ReadiML sleep forecasting engine. Any disruption to your normal sleep, whether from sleep loss, jet lag or night duty, can significantly impact your ability to perform safely and effectively. Specifically, sleep impacts your cognitive performance, reaction time, and lapse likelihood (propensity for a micro sleep). When you wake up, open the ReadiOne application and you'll receive a personal risk assessment ("ReadiScore") for each of the 18 hours ahead, enabling you to easily visualize if and when you'll be at your best and worst in the day ahead. You'll also be able to track daily improvements to your readiness over time, and you'll receive alerts before your fatigue may reach critical levels. ReadiOne is based on validated algorithms developed with 25 years of sleep research from the US Army Research Lab, and available exclusively from Fatigue Science. Use of ReadiOne requires an enterprise license to the Readi Fatigue Risk Management Platform. Please see ReadiSupervise by Fatigue Science for supervisor mobile fatigue management tools or visit https://app.fatiguescience.com for web based fatigue management tools.
Ratings & reviews
3.8
13 ratings
What’s new
Version 4.6.7 · Updated September 23, 2026
This patch fixes an issue that could prevent biometric sign-in from working correctly for some users.
App privacy
The developer, Fatigue Science, reported these privacy practices to Apple.
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Contact Info: Email Address, Name
Used for: App Functionality
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Diagnostics: Crash Data, Performance Data, Other Diagnostic Data
- Location: Precise Location
- Identifiers: User ID, Device ID
Used for: Analytics, App Functionality
Alternatives to ReadiOne by Fatigue Science
Looking for apps like ReadiOne by Fatigue Science? Here are 6 similar apps on the App Store. The highest rated is CBC Lightning (5.0/5), and all 6 are free to download.
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CBC Lightning
5.0
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AlertMeter
4.4
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Fatigue Meter App
1.6
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LifeMed Alaska
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NASA PVT+
4.8
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Trackuility - ME/CFS Pacing
4.2
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| ReadiOne by Fatigue Science | 3.8 / 5 (13 ratings) | Free | September 23, 2026 | |
| CBC Lightning | 5.0 / 5 (2) | Free | Oct 20, 2026 | Compare |
| AlertMeter | 4.4 / 5 (15) | Free | Aug 17, 2026 | Compare |
| Fatigue Meter App | 1.6 / 5 (14) | Free | Oct 13, 2026 | Compare |
| LifeMed Alaska | – | Free | Jan 27, 2026 | Compare |
| NASA PVT+ | 4.8 / 5 (10) | Free | Dec 9, 2025 | Compare |
| Trackuility - ME/CFS Pacing | 4.2 / 5 (5) | Free | Jul 8, 2026 | Compare |