Simple Transposer app for iPhone and iPad

Simple Transposer is a musical utility allowing quick transposition between C, Bb & Eb instruments.
Designed for immediate response in any musical situation: performing, learning, teaching, etc.
A simple study tool to help educate musicians of all ages.
Easily transpose between all the basic instruments such as saxophones, clarinets, guitars, trumpets and pianos.

Use the top-left control to choose which instrument type to transpose from and use the top-right control to choose which instrument type to transpose to.

Tap Letters to change from Sharps to Flats.

Usually Simple Transposer iOS app used & searched for