NightOwl Companion funktioniert nicht

This app will allow you to interact with the NightOwl sensor, which will check whether you suffer from sleep-related breathing disorders by measuring signals from the tip of your index finger with a small light sensor that connects wirelessly with your smartphone.  Setting up the test is very straightforward and will only take a few minutes of your time with the help of the in-app instruction videos.  Disclaimer: This app may provide information from external medical devices.  Before making any medical decisions based on the presented information, read carefully the instructions provided with such external device and seek a healthcare professional's advice as applicable.