Doesn't work. Don't waste your money.
Nice to see that the Dev responds to feedback! Doesn't force close on my Nexus 5X any more, but does day "unable to create Bluetooth server on the phone".
I'm having the same problem as Nathan on a Pixel2 XL. I hope you are able to fix it, I'll gladly pay for the full version too. Thanks.
2.2 : Broadcast HR with Garmin watch + tried to fix Android 8 issue
2.1 : New Garmin communication protocol to ensure better compatibility with Android smartphones. Please update your watch app if you are using a Garmin watch with Treadmill Speed Transmitter.
I tried to fix the crash with Android 8 due to new Android restriction on background services but I have no device to test it on... I would really appreciate if you give me feedback if it works or not.