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.

* 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:

What’s New

Version 4.1.0

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.

Ratings and Reviews

brosnaro ,

Crashes so frequently it's nearly unusable

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.

cl7070 ,

Great idea, somewhat unstable

It crashes sometimes during the test itself, sometimes during the data entry before the test.
Other than that, great.

Ryanwyan123 ,

I've been looking for something like this

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 :)

App Privacy

The developer, Neuro Summum Inc., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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