PolyTune!

Its the most powerful tool youve ever had in your pants You know for tuning. That said, this is one of those nuggets on the App store you cannot afford to miss if you value being in tune and you take your smartphone with you when you go places. Specifications:- Reference pitch from 435Hz to 445Hz- Drop tuning from E-flat to B- 0.5 cent accuracy - 2 chromatic tuning modes: Needle and Stream- MonoPoly recognizes whether one or several strings are played at once