How to use PocketPiano with GarageBand on your iPhone
1. Download GarageBand from the AppStore and open it.
2. Start a new project with a “Keyboard” track.
3. Press the Settings button in the Controls bar.
4. Click Advanced, and then click Bluetooth MIDI Devices.
5. Click the name of the device you want to connect and then click the Connect button to activate it.
6. To stop using the device, click the Connect button to deactivate it.