sleep² sleeptracker & analysis

Medical

★★★★★ 3.3

Installs

10,000+

Price

Free

Developers

Nukkuaa

Content Rating

Everyone

Android Version

Version

V3.4.1

sleep² sleeptracker & analysis APP Download

sleep² sleeptracker & analysis is a unique application that combines sleep tracking with personalized training, ensuring you receive the most accurate insights into your sleep patterns. Designed for those who truly value high-quality regeneration, sleep² is more than just a tracking tool—it acts as your sleep coach.

This app, which is medically certified in the EU for treating acute sleep disorders like insomnia, employs an evidence-based approach to address and improve sleep quality. With its step-by-step structure, users participate in tracking their sleep while accessing tailored training modules to enhance their rest quality.

What makes sleep² stand out is its adaptive nature. It evolves alongside your sleep patterns, delivering precise, personalized suggestions based on your unique data. Gain insights through detailed recommendations, audio relaxation exercises, and informational videos designed to optimize your sleep habits.

Further enhancing its functionality, sleep² synchronizes effortlessly with Apple Health and Google Health, making it easy to integrate and monitor your existing health data. Choose between using a compatible sensor for enhanced accuracy or manually logging your nights—either way, the app will provide valuable reports to help you understand and improve your sleep.

Although the app offers a free version, unlocking its full potential requires a subscription. However, users can enjoy flexible subscription plans to cater to their preferences. Downloading sleep² paves the way for a more fulfilling, healthy lifestyle!

User Reviews from Google Play Store

Brandon Brodeur

Mar 2, 2026

★★★★★(1)

will connect at the beginning of the night, but about 60% of the time it will not connect in the morning to assess your sleep data. I try everything it recommends in the prible solving section and that will only work about a third of the time.

Version: V3.5.0

Developer Response

Hi Brandon!We’re sorry to hear that the connection often fails in the morning!In some cases,this behavior can be related to certain Polar firmware versions or to the simultaneous use of the Polar Flow app,which may block the connection. Please contact us at hello@sleep2.com-so we can review your case individually and help resolve the issue quickly.

Zlatin Balevsky

Feb 11, 2026

★★★★★(1)

Could not connect to my H10 sensor no matter what I tried. The instructions on their FAQ page are not helpful at all. Also, the app expects me to not install a firmware update for the sensor which has been released over 2 months ago... and they still have not made their product work with it. Overall very unprofessional experience, too bad I really wanted to test their algorithm.

Version: V3.5.0

Developer Response

Hi Zlatin,we’re very sorry for the inconvenience!Issues are related to a Polar firmware update, which can cause connection problems.The root cause lies within Polar and will need to be resolved by them directly.Please contact us at hello@sleep2.com,we can provide a suitable workaround and want to ensure you can use sleep² reliably

De

Feb 4, 2026

★★★★★(3)

Using it with Polar Verity sensor. Bought a year subscription because of supposed algorithm accuracy and future potential. But at this point I am starting to get a bit disappointed. The app could use a lot of improvements but it seems development is either really slow or halted. Not sure if I will renew. Sleep values also strangely seems to be 100% identical on many nights, which I find hard to believe..

Version: V3.5.0

Developer Response

Thank you for your honest feedback!Your input is highly valuable in shaping improvements and we’re sorry to hear that you’re feeling disappointed!Please contact us at hello@sleep2.com,we'd love to clarify things with you together! Btw:We’re working on major updates (Polar Loop integration,algorithm upgrade, AI-driven sleep&factor analysis coach) :)

Caro M

Feb 3, 2026

★★★★★(2)

After a month of trying it out, I still can't grasp the purpose of this app and am very frustrated that I spent so much time entering data into this. Implementing a simple model or using AI to directly correlate my potential influencing factors with my sleep data can't be that hard. W/o these insights, I merely see the data from my tracker in another view and get some nice videos with tips or the usual relaxation techniques. I'm grateful that this was sponsored and I didn't pay for it myself.

Version: V3.5.0

Developer Response

Thanks Caro!The best results come from combining sleep statistics with the intensive sleep training(especially when using a Polar sensor, which provides very valuable insights into sleep).A major update is coming soon incl improved sleep coach&sleep factor analysis,which will make the connections between the factors you enter and your sleep clearer

Random Human

Feb 1, 2026

★★★★★(1)

Hello, is there an English version of the app? I'd love to test it's sleep tracking with the H10. ..... editing this after testing as the app is offered now, it is completely worthless. don't waste a night of wearing the H20 and battery, you will literally get nothing but sleep duration unless you sub. as hyped this app is, the monetizing aspect is atrocious also not worth giving the app your data in the profile that you need to complete cheers

Version: V1.5.4

Developer Response

Thanks for your interest in Nukkuaa! We are currently working on the translation and want to publish it soon. We're looking foward to welcome you to Nukkuaa as soon as the English version is available. Subscribe to our newsletter to receive the latest information about that:)