NightOwl Companion

4.7
19.9K reviews
Content rating
Everyone
100K+
Downloads
Content rating
Everyone
Learn more
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About this app

This app allows you to interact with the NightOwl sensor that measures signals from your index finger with a small light sensor to check if you have sleep-related breathing disorders.

You can set up the test in a few minutes using the in-app instructional videos. Wear the sensor for the prescribed number of nights to complete the test.

Disclaimer: This app may provide information from external medical devices. Before making any medical decisions based on this information, read the device instructions carefully and speak with your healthcare provider.
Updated on
Feb 6, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location, Personal info and 3 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.7
19.7K reviews
Aaron Corpus
April 16, 2026
App is very unstable and keeps glitching out an recording when I don't want it too. Now Daybreak is saying that that can't find record of the first test I took last night but the Night owl support team is telling me that it was completed successfully. I will happily change this review if the app gets fixed or we find a solution. - The app worked and everything was resolved. Thanks night owl.
1 person found this review helpful
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Stephen Davidson
April 25, 2026
Does Not Work. Last night the app itself froze and it would not respond this morning. It would not stop recording so I closed the app and re-opened it. Once I did that I was able to stop recording. Then I get an error message stating that it didn't record because the sensor wasn't connected even though I followed the set up instructions perfectly. I've had 1 successful night out 5 recording data for this test and ive done the exact same thing every night for the test. So it's definitely not me.
1 person found this review helpful
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Adrian Hunt-Davies
January 9, 2025
Not a good app for uploading sleep data. I have been using the app for a week while trying to complete a four-day sleep study. The device connects through the app each night, but in the morning, it fails to upload on most occasions. The only way to stop the upload attempts is to remove and reinstall the app, and then redo the sleep study. It is a very easy app to navigate. This is why I have given it two stars. I reached out to NightOwl; I received a basic reply that it could be my connection.
23 people found this review helpful
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What’s new

- Minor feature enhancements
- Performance improvements
- Bug fixes

Thank you for using NightOwl!