Confirm the keyboard first
Check that the instrument actually supports Bluetooth MIDI, not only Bluetooth audio or a companion app.
Before judging the practice session, make the connection path stable. A good Bluetooth MIDI setup should let the iPad see the keyboard quickly, receive notes consistently, and stay out of the way while you work on timing and control.
Check that the instrument actually supports Bluetooth MIDI, not only Bluetooth audio or a companion app.
Many keyboards connect from inside the music app or iPad MIDI chooser, not from the general Bluetooth audio screen alone.
If notes drop or the device disappears, solve the connection issue before drawing conclusions about precision or stability.
Put the piano or controller into its Bluetooth MIDI pairing mode before opening the app connection sheet.
If the app cannot scan for devices, confirm iPad Bluetooth is on and the app still has Bluetooth permission.
Play a few adjacent notes slowly and confirm they register cleanly before starting a full Hanon run.
Disconnect duplicate keyboards or bridge apps if the wrong device is being captured.
Use a speed that makes note timing readable before testing faster repetitions.
Check whether the setup is clean enough to trust the result, then adjust technique instead of guessing.
If a keyboard needs a specific pairing sequence, write it down once so it does not interrupt future practice.