Apps like YDS Controller

Here are some great alternatives to YDS Controller by Yamaha Corporation :
Sax Tuner Demo
Sax Tuner Demo
★4.0
How To Play Saxophone
How To Play Saxophone
★4.1
Tenor Saxophone *Plugin*
Tenor Saxophone *Plugin*
★4.0
BTS for ME-90
BTS for ME-90
★4.7
Piano MIDI Legend
Piano MIDI Legend
★3.8
Musical Instrument-Learn Piano
Musical Instrument-Learn Piano
★4.4
BTS for GX-100
BTS for GX-100
★4.1
Taiko Sounds - instrument app
Taiko Sounds - instrument app
★3.7
Fine Chromatic Tuner Pro
Fine Chromatic Tuner Pro
★4.3
MIDI App ( trial version )
MIDI App ( trial version )
★3.6
Saxophone Music App
Saxophone Music App
★4.2
Chromatic Tuner and Tone Maker
Chromatic Tuner and Tone Maker
★4.2
Rockrelay Synth FM
Rockrelay Synth FM
★4.1
Bluetooth MIDI Connect
Bluetooth MIDI Connect
★4.6
Piano MIDI Bluetooth USB
Piano MIDI Bluetooth USB
★4.5
Piconica
Piconica
★4.3