“Bandmate” is a new tuner that I am recommending to all students. Though my favorite is still TE Tuner (stands for Tonal Energy), the Bandmate tuner will let you know what note you are playing based on YOUR instrument and not necessarily in concert pitch (which makes it challenging for clarinets, bass clarinets, all saxes, and french horns). Hope this helps!
NOTE to parents: Students received this info about two weeks ago and this app is available on the App store and Android store
Search the Band Website
Contact Mr. Marc Whitlock, Director of Bands734-416-7960 (preferred method) firstname.lastname@example.org