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NightOwl Companion

NightOwl Companion

The NightOwl companion app

57K ratings
490 reviews
#79 in free Medical
🏥 Medical
Free

Details

Released
July 30, 2018
Updated
February 11, 2026

Developer

Ectosense BVBA
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iphone
ipad
📈no. 79
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⭐490
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🔄6+ apps
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❓5 answered
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📦w/o updates
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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 about NightOwl Companion

Reviews of NightOwl Companion are mixed: the Medical app is rated 4.8/5 from 57K App Store ratings. What users like most: easy to use, convenient home testing. Top complaints: connectivity issues, unreliable data upload. Summarized from real user reviews.

Positive things

  • 👍Easy to use
  • 🚀Convenient home testing
  • 🚀Comfortable device
  • 🚀Improved over traditional testing
  • 🚀Unobtrusive during sleep

Negative things

  • 🐛Connectivity issues
  • 🐛Unreliable data upload
  • 🐛Unclear instructions
  • 🔋Interference with CPAP use
  • 🔋Numbness in finger from device
See all reviews

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

📈 79+24

Medical

This app rose +24 positions in Medical chart.

Last updated on October 18, 2026.

User reviews

Most RecentHighest RatedLowest Rated

Night owl companion

Night owl did not effect me sleeping .
Had to get use to the thing on my finger. After that I was able to sleep
29Ghost29Ghost

Confused

Its me I know. I’m worried. I as to use my cpap and hope it doesn’t ruin my test
Luella’sLuella’s

Sleep well

Very Simple, easy directions, light weight piece on my left pointer finger with discomfort. Thank you Night Owl!
Wederosa78Wederosa78

Easy

Very easy to use device and application
Liking' the productLiking' the product

So convenient

Haven’t received the report yet, but it was easy to set up and got to sleep in my own bed.
LISABUTCHERLISABUTCHER
See 485 more reviews

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.