Well Tempered!

Well Tempered is a chromatic instrument tuner, pitch pipe and tuning forkusing your iPhone or iPads speaker and microphone, or an external microphone. Well Tempered features 268 unique temperaments that you can customize to start with any of 12 notes, totalling 3205 unique tunings You can define a precise reference frequency, such as A = 417.32 Hz, making Well Tempered a favourite among instrument makers. Control the tuner through your Apple WatchMade by musicians, for musicians with input from musicians