Didn’t work for me initially, follow details below
Initially: I’m on firmware V1.20 of the Icom IC-705. Sadly this software doesn’t seem to work with the radio. I am paired to the radio but the device just keeps coming up with the pairing message. Despite repeating this several times, no joy. Resolution: I was already connected to Bluetooth as you’d connect a regular device. Once I’d disconnected that link, I was able to pair the app to the radio. It’s a solid 4* at the moment, but I’d give 5* if I was able to do more settings from the phone.