iPhone Screenshots


Sleep-2-Peak is the most sensitive non-invasive scientific tool for measuring your fatigue and alertness.  Figure out your unique circadian rhythm and how to be most alert during the day. 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 this task in their studies of fatigue and alertness.

Our fatigue measurement 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.

Developed by neurologists and cognitive psychologists with expertise in sleep and alertness.  After years of personally testing the app and submitting the findings to various sleep conferences, the app was validated in a University research setting in a group of individuals. The task was found to be equivalent to the gold standard alertness tasks in the scientific community.

Your data is YOURS! Save and export the data for yourself or contribute to our reaction time database. We believe that this data is yours and you get access to all the fine grained aspects of the data!

The application was developed to be sensitive to detecting:
- Sleep need
- The circadian rhythm (alertness variation with time of day and body rhythms)
- Mental and physical capacity (results shown to correlate with mental and physical performance)
- Influence of substances

By using sleep-2-Peak, you will become aware of alertness variations beyond what you can feel and you will discover how powerful your schedule choices can be to boost your performances naturally.

* Store up to 7 reaction time tasks
* See and export up to 7 reaction time tasks and get each reaction time value
* Get averages and other stats on your reaction time

PREMIUM ($2.99 for a month subscription and monthly auto-renew)

* Store and export more than 7 days of data
* Long term trends - visualize your alertness levels over time
* This subscription will auto-renew monthly

Privacy: https://sonicsleepcoach.com/privacy/

Terms of Use:

What’s New

Version 3.1.0

- update to privacy and terms of use

Ratings and Reviews

Daniel Gartenberg ,

Fixed crash issue (from developer)

Hi brosnaro -
We addressed the issues with the app crashing.
Sorry about that.

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.

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 :)


Neuro Summum Inc.
8.6 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, French
Age Rating
Rated 4+
© Proactive Life LLC
In-App Purchases
  1. sleep-2-Peak Premium $2.99


  • Family Sharing

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

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