NightOwl Companion

NightOwl Companion

The NightOwl companion app

57K ratings
444 reviews
#99 in free Medical
🏥 Medical
Free

Details

  • Released
  • Updated
  • July 30, 2018
  • February 11, 2026
NightOwl Companion screenshot #1 for iPhone
NightOwl Companion screenshot #2 for iPhone
NightOwl Companion screenshot #3 for iPhone
NightOwl Companion screenshot #4 for iPhone
NightOwl Companion screenshot #5 for iPhone
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About

Monitor your sleep for breathing disorders using a finger sensor. The app guides you through setup and data collection over several nights. Consult your healthcare provider for medical decisions.

Sleep breathing disorder detection
Index finger sensor interaction
In-app instructional videos
Multi-night data collection
Medical device information display
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What users say

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What's New in NightOwl Companion

6.1.0

February 11, 2026

Performance improvements and bug fixes for a smoother, more reliable app experience.

Charts

Top Free

📈 99+4

Medical

This app rose +4 positions in Medical chart.

Last updated on September 1, 2026.

User reviews

Alfonso

Es un estudio super lo cual te ayuda a saber que tan bien duerme o si tienes algún síntoma de falta de oxígeno

Easy To Use

Simple instructions and comfortable to wear. No issues.

Easy to Use

I thought the setup and use was very easy, Thank You.

My First Night Owl,night

SETTING UP WAS WELL EXPLAINED AND So simple. It was easy to record and not bothersome having it on my finger all night. I slept my normal pattern being in my own home environment .. Will share my second night soon I recommend this for anyone in need of a sleep study.

Be prepared to waste time!

Have been trying to get this app to work for two days and have been coordinating with my healthcare provider. It keeps saying that my birthdate is incorrect despite the fact that it’s the same birthdate healthcare provider has on file not to mention the day that I was born. Have deleted and reinstalled the app multiple times. Have tried different activation methods. App seems buggy to begin with and don’t really feel comfortable with it on my phone anymore
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User experience

🐞

Reported Bugs

4 issues

Repeated error codes with sensor

Bug

App crashes during setup

Bug

Inability to input or scan codes

Bug

Unsuccessful data uploads

Bug

Requested Features

4 requests

Dark mode option

Feature

Instant access to test results

Feature

Compatibility with left-handed users

Feature

In-app guidance for seniors

Feature

FAQ

What does the NightOwl Companion app do?

This app works with the NightOwl sensor to measure signals from your index finger, helping to identify potential sleep-related breathing disorders. It guides you through the testing process and collects data over multiple nights.

How do I set up the test?

Setting up the test is simple and takes only a few minutes. The app provides instructional videos to guide you through the process of preparing and using the sensor.

Is this app free to use?

Based on the provided information, the app is free to use. There are no mentions of in-app purchases or subscription fees associated with its core functionality.

What should I do with the medical information provided by the app?

The app may provide information from external medical devices. It is crucial to read the device instructions carefully and speak with your healthcare provider before making any medical decisions based on this information.

Who is the target audience for this app?

This app is designed for individuals who are experiencing or are concerned about sleep-related breathing disorders. It is intended for use by those who are utilizing or considering the NightOwl sensor for monitoring.