# NightOwl Companion — The NightOwl companion app

> Sleep disorder monitoring via finger sensor and companion app. (iPhone/iPad app by Ectosense BVBA.)

- Source: https://appshunter.io/ios/app/nightowl-companion/id1397382074 (this page in markdown: same URL + `.md`)
- Developer: [Ectosense BVBA](https://appshunter.io/developer/1397382073)
- Category: Medical
- Price: Free
- Rating: 4.79/5 from 56,815 App Store ratings · 444 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.2 · 41 MB
- Languages: English
- Released: 2018-07-30
- Data updated: 2026-08-28
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/nightowl-companion/id1397382074/reviews.md

## What is NightOwl Companion?

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.

## Key features

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

## Chart rankings

- #67 in Top Free · Medical (US App Store)

## What do users think of NightOwl Companion?

Overall sentiment: neutral

**Pros**

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

**Cons**

- 🐛 Connectivity issues
- 🐛 Unreliable data upload
- 🐛 Unclear instructions
- 🔋 Interference with CPAP use
- 🔋 Numbness in finger from device

**Commonly reported bugs**

- Repeated error codes with sensor
- App crashes during setup
- Inability to input or scan codes
- Unsuccessful data uploads

**Most requested features**

- Dark mode option
- Instant access to test results
- Compatibility with left-handed users
- In-app guidance for seniors

## Recent user reviews (10 of 444)

All indexed reviews: https://appshunter.io/ios/app/nightowl-companion/id1397382074/reviews.md

### 5/5 — Alfonso

*2026-08-24, version 6.1.0*

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

### 5/5 — Easy To Use

*2026-08-24, version 6.1.0*

Simple instructions and comfortable to wear. No issues.

### 5/5 — Easy to Use

*2026-08-24, version 6.1.0*

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

### 5/5 — My First Night Owl,night

*2026-08-23, version 6.1.0*

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.

### 1/5 — Be prepared to waste time!

*2026-08-21, version 6.1.0*

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

### 5/5 — Great experience

*2026-08-19, version 6.1.0*

Do much better than the strap on equipment and going in to the company where you sleep in their room and a strapped with their equipment. You have
My vote!

### 5/5 — Great Experience

*2026-08-18, version 6.1.0*

Well designed app. Instructions very clear and videos very helpful. Well done.

### 5/5 — Can’t sleep

*2026-08-18, version 6.1.0*

I just can’t sleep. I’m not sure why a couple hours and that’s all I could.

### 5/5 — NightOwl

*2026-08-17, version 6.1.0*

I like this concept of the night owl something new to me and I’m always willing to try it. Thank you. N

### 5/5 — NightOwl Sleep Study Review

*2026-08-16, version 6.1.0*

I had a very positive experience with the NightOwl Sleep Study. The device was small and attached easily to my left forefinger using the tape provided. It was simple to set up, comfortable to wear throughout the night, and did not interfere with my sleep.

One of the biggest advantages is that you can complete the sleep study in the comfort of your own bed rather than spending the night in a sleep lab. The process was convenient, easy, and stress-free.

I would highly recommend the NightOwl device to anyone who needs a sleep study. It provides a comfortable and user-friendly way to gather important sleep data from home.

## Frequently asked questions about NightOwl Companion

### 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.

## Version history (last 5 releases)

### 6.1.0 — 2026-02-11

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

### 6.0.9 — 2025-11-05

Improvements and bug fixes

### 6.0.8 — 2025-04-03

Minor bug fixes

### 6.0.7 — 2025-02-28

Minor bug fixes

### 6.0.6 — 2025-02-18

Minor bug fixes

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*