I build a Bluetooth Page Turner Footswitch for my iPad using an Adafruit Feather and some momentary switches. Cross posting with r/Adafruit. : r/diypedals
IK Multimedia BlueTurn Wireless PageTurner Footswitch | Guitar Center
Amazon.com: Music Page Turner for Tablets - Connected by Bluetooth for Flip Pages from Music Software - Controlled by Foot Switch - IOS and Android System Support (Cube Turner) : Musical Instruments
FiveLoop - How to use a Bluetooth Footswitch in iOS (iPad or iPhone) - YouTube
Foot pedal for iPad/Garageband? | MacRumors Forums