I had the same issue with my new iPhone 7 ,.. iPad Air 2 had no problem with Remote Power on. After
- Removing the app
- Removing the Bluetooth pairing
- Reinstalling the app
- Reconnecting the Boom
My problem was solved. I'm now able to remote power the Boom with my phone.
Which technology makes this remote power available? I've got mulitple bluetooth devices that do not support that feature. Is that a feature from bluetooth 4?