Hey micah0219,
Thanks for using Apple Support Communities! We understand you're looking to give an app and its accessory permission to use Bluetooth. If you haven't already, let's make sure Bluetooth is turned on by tapping Settings > Bluetooth. Then, we'll want to check to be sure the app has permission to use Bluetooth. To do that tap Settings > Privacy > Bluetooth. Do you see the Monster Smart app listed here? If so, tap it to give permission to use Bluetooth. Additional details about this feature can also be found here: If an app would like to use Bluetooth on your device
We hope this helps. Take care!