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CompareOpen in Google Play
Where this app stands in United States, updated 9 Oct 2026
Top free · Medical
#69 ▲4
Top grossing
Not in this chart today
Top paid
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| Date | Free |
|---|---|
| 9 Oct 2026 | #69 |
| 8 Oct 2026 | #73 |
Best rank in each country today. Click a country to see its graph.
- Minor feature enhancements - Performance improvements - Bug fixes Thank you for using NightOwl!
The NightOwl Companion app allows you to interact with the NightOwl sensor.
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.