# sleep-2-Peak, sleep need tool — Get YOUR sleep, Give your BEST > Scientific tool to measure alertness variations and optimize sleep/activity schedules. (iPhone/iPad app by Neuro Summum Inc..) - Source: https://appshunter.io/ios/app/sleep-2-peak-sleep-need-tool/id557632863 (this page in markdown: same URL + `.md`) - Developer: [Neuro Summum Inc.](https://appshunter.io/developer/1447290703) - Category: Health & Fitness - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 9.0 · 27 MB - Languages: American English - Released: 2012-09-10 - Data updated: 2026-06-05 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/sleep-2-peak-sleep-need-tool/id557632863/reviews.md ## What is sleep? Sleep-2-Peak is a highly sensitive scientific tool developed by sleep specialists that will show you your best sleep and work/activity schedule by measuring your alertness variations. No other device or wearable required. Figure out your unique circadian rhythm and how to be most alert during the day. Use sleep-2-Peak to demonstrate to others your sleep need and ideal work/activity schedule contributing to your wellbeing. Your alertness variations are measured with a scientifically validated, short and simple reaction time test and/or through Text-Speed able to track your texting speed variations (patent pending). Your results are linked to your previous night bedtime/out of bed time to see what sleep schedule allows YOU to be at your BEST the next day. Your reaction time variations throughout the day are also demonstrated on a second graph to see what time of day is associated to your best performances. Ideal for high performance athletes, executives, and anyone else who wants to know the best time to sleep, workout, and even engage in analytical and creative activities. Researchers can also use sleep-2-Peak in their studies of fatigue and alertness as its reaction time test is proven to be as sensitive as the widely used PVT or even more sensitive for some aspects (sleep-2-Peak compared to the gold standard PVT-192). It is also more practical as every subject can have their own measuring device and transfer their data if desired to the researcher. Developed by a neurologist specialized in sleep medicine, cognitive psychologists with expertise in sleep and alertness and experts in digital health. Our fatigue measurement reaction time task is scientifically validated in a peer reviewed publication: Brunet, J. F., Dagenais, D., Therrien, M., Gartenberg, D., & Forest, G. (2017). Validation of sleep-2-Peak: A smartphone application that can detect fatigue-related changes in reaction times during sleep deprivation. Behavior Research Methods, 49, 2, 1460-1469. >10 poster publications that validate the use of the app for measuring physical and cognitive states. Your data is YOURS. You can export your data to your computer and select data you would like to export to others. Your data could also contribute to a global database to allow a better understanding of circadian rhythms and what can be done to improve schedules and wellbeing. In this event, your permission will be required to have your data entered in the database. The application was developed to be sensitive to detect: - Sleep need - The circadian rhythm (alertness variation with time of day and body rhythms) - Mental and physical performance variation (correlation with reaction time test) - Influence of substances By using sleep-2-Peak, you will become aware of alertness variations beyond what you can feel. You will discover how powerful your schedule choices can be to boost your performances naturally. FREE * Measure your alertness level and circadian variations * Link your bedtime schedule and substance use (coffee, alcohol…) to your results * See graphics of your best bedtimes and best alertness times * Get averages and other stats related to your reaction time tests and texting speed * Store and export up to 7 days of data PREMIUM ($2.99 USD/month or $19.99 USD/year subscription with auto-renew) * More precise best bedtimes and work/activity schedule with increased use * Long term alertness level trends and effect of habit changes * Measure your alertness level and circadian variations * Link your bedtime schedule and substance use (coffee, alcohol…) to your results * See graphics of your best bedtimes and best alertness times * Get averages and other stats related to your reaction time tests and texting speed * Store and export all your data * This subscription will auto-renew Privacy and terms of use: http://www.neurosummum.com/sleep2/Neuro-Summum-sleep-2-Peak-End-User-License-Agreement-EULA.pdf ## Key features - Measure alertness variations - Identify unique circadian rhythm - Optimize sleep and activity schedules - Scientifically validated reaction time test - Track texting speed variations - Exportable user data ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | sleep-2-Peak Premium | $2.99 | per month | | sleep-2-Peak Premium Yearly | $19.99 | per year | | sleep-2-Peak Premium Monthly | $2.99 | per month | ## Recent user reviews (10 of 11) All indexed reviews: https://appshunter.io/ios/app/sleep-2-peak-sleep-need-tool/id557632863/reviews.md ### 1/5 — Where's the test? *2024-08-31, version 4.1.0* So fun that the interface doesn't show you where to do the vigilance test. Brilliant. User interface team, A+! Did you think to test it on uninitiated subjects and see how they interact with the program? hard to imagine that you did and didn't discover the importance of having clear buttons signalling where to find the test... ### 5/5 — Fixed crash issue (from developer) *2015-11-01* Hi brosnaro - We addressed the issues with the app crashing. Sorry about that. --Dan ### 2/5 — Crashes so frequently it's nearly unusable *2015-08-28* Sadly this app crashes so frequently that it's nearly unusable. To make matters worse, the crashes typically occur upon completion of the visual psycho-motor tests, losing the data collected during the test. While the idea of better understanding the effect of sleep patterns on performance is attractive, and the pedigree of the app's developers lend it credibility, the basic dysfunction of the app renders it unworkable and not worth the effort to undertake the tests repeatedly. ### 4/5 — Great idea, somewhat unstable *2015-08-28* It crashes sometimes during the test itself, sometimes during the data entry before the test. Other than that, great. ### 1/5 — Ne fonctionne pas IPAD *2013-10-21, version 1.1* Je viens de payer 3 dollars et pendant l'explication, l'apps se ferme toute seule. Aidez-moi svp. ### 5/5 — Great App!! *2013-02-26, version 1.0* As sleep researchers, we always look out for easier and reliable ways to measure vigilance across long periods of time. This App does it! This is a great tool and its simplicity is amazing. It can be compared to the traditional and classic Psychomotor Vigilance Test (PVT) widely used in sleep research but with portability and accessibility qualities that make this App more advantageous. ### 5/5 — Brought me to a higher level! *2013-01-07, version 1.0* I tought I could go to bed late and stay alert, but this app showed me that even a single late bedtime affects my reaction times for a few days. Thanks to this app, I'm now aware that going to bed earlier really improves my performances. ### 5/5 — Finally! *2012-11-21, version 1.0* We ve been searching for a tool to help our top performing clients achieve their full potential. sleep-2-Peak has brought our practice to a new level, helping people to measure themselves in a way to better understand what makes them achieve their peak states. ### 5/5 — great app *2012-09-28, version 1.0* Really easy to use. simple yet precise and useful. the graphs are interesting to learn about your "best" sleep pattern not only to be ready for your day but to be at peak for your performance (physically and/or mentally) ### 5/5 — I've been looking for something like this *2012-09-25* As a marathon runner I've been looking for something that can give me better feedback on how I can organize my schedule around better exercise. Thanks guys for developing this app :) ## Frequently asked questions about sleep ### What is sleep-2-Peak? Sleep-2-Peak is a scientific tool developed by sleep specialists to measure your alertness variations and help you understand your unique circadian rhythm. It provides insights into your optimal sleep and activity schedules to enhance your wellbeing and performance. ### How does sleep-2-Peak measure alertness? Sleep-2-Peak uses a scientifically validated, short reaction time test and/or Text-Speed to track variations in your alertness. These results are then correlated with your sleep schedule to determine what allows you to be at your best. ### What kind of data does sleep-2-Peak track? Sleep-2-Peak tracks your alertness level, your circadian rhythm (alertness variations with time of day and body rhythms), and mental/physical performance variations. It can also help identify the influence of substances on these metrics. ### Can I export my data from sleep-2-Peak? Yes, your data is yours. You can export your data to your computer and select specific data to share with others. Your permission will be required if your data is to be contributed to a global database for research. ### What are the subscription options for sleep-2-Peak? Sleep-2-Peak offers a Premium subscription with monthly and yearly plans. The monthly plan is $2.99 and includes a 7-day free trial, while the yearly plan is $19.99. ### Is sleep-2-Peak available on all devices? Sleep-2-Peak is available on iPhone, iPad, and iPod. It is designed for iOS devices. ### How often is sleep-2-Peak updated? The latest version of sleep-2-Peak is 4.1.0, which was last updated on March 5, 2020. The app was originally released on September 10, 2012. ### Does sleep-2-Peak have ads? No, sleep-2-Peak does not contain advertisements. It is a free app with optional premium subscription features. ## Version history (last 5 releases) ### 4.1.0 — 2020-03-05 Texting speed tracking to measure alertness variations (patent pending). Automatic time in bed detection to facilitate sleep schedule/peak performance association. Improved graphic design: Your best reaction times and/or texting speed show you your best sleep schedule and best time of day for peak performance. Improved data exportation: All your reaction times and texting speed results with all associated information including bedtime/out of bed time, time of measurement and substance use are easily exportable through a csv file. Improved data filters and diary layout to better understand what leads to your best alertness and best mental/physical performances. Bugs fixed. ### 3.1.0 — 2018-05-14 - update to privacy and terms of use ### 3.0.0 — 2017-11-16 - GUI update - Added premium subscription model ### 2.2.1 — 2015-10-30 - Updated app to be compatible with new iOS ### 2.1 — 2015-03-24 changed background screen for game ## Apps similar to sleep | App | Rating | Price | Category | | --- | --- | --- | --- | | [PillRem](https://appshunter.io/ios/app/pillrem/id1617850877) | — | Free | Health & Fitness | | [whereabout running](https://appshunter.io/ios/app/whereabout-running/id6474457470) | 5.0 (1) | Free | Health & Fitness | | [Rejuvenation Science](https://appshunter.io/ios/app/rejuvenation-science/id6464392504) | — | Free | Health & Fitness | | [ReadiSync by Fatigue Science](https://appshunter.io/ios/app/readisync-by-fatigue-science/id1044418061) | — | Free | Health & Fitness | | [TwinFitness](https://appshunter.io/ios/app/twinfitness/id1673588856) | 5.0 (5) | 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 2026-06-05.*