Apps like USBMIDIConnect

Here are some great alternatives to USBMIDIConnect by David W Stone :
Melodi MIDI Controller
Melodi MIDI Controller
★4.0
PitchBend Pro
PitchBend Pro
★4.0
SoundFont-MidiPlayer-Piano
SoundFont-MidiPlayer-Piano
★4.1
USB Midi Visualizer
USB Midi Visualizer
★3.7
Link to MIDI Bridge
Link to MIDI Bridge
★5.0
Rockrelay Synth FM
Rockrelay Synth FM
★4.1
Piano MIDI Bluetooth USB
Piano MIDI Bluetooth USB
★4.5
MIDI Drum
MIDI Drum
★4.6
FluidSynth MIDI Synthesizer
FluidSynth MIDI Synthesizer
★4.0
MIDI Keyboard
MIDI Keyboard
★3.5
MIDI Controller
MIDI Controller
★3.7
MIDI Controller
MIDI Controller
★3.8
Note Teacher
Note Teacher
★4.4
MIDI Hub - Route & Edit Live
MIDI Hub - Route & Edit Live
★4.7
Audio Evolution Mobile Studio
Audio Evolution Mobile Studio
★4.3
Piconica
Piconica
★4.3