I just tried it as I was intrigued, but it didn’t go so well.
The first thing it did was complain about not being able to connect to its notifications server, so I couldn’t enable notifications… even looked into the app permissions and there was nothing preventing it from pushing notifications.
Then I wanted to see which OSS was used and that link didn’t work. (possible license violation?)
After that I wanted to try the mode where you can communicate locally through BLE and all that. Enabling that feature causes the app to just crash when opening it.