Descriptions : PianoMeter is a piano tuning app that turns your Android device into a professional electronic tuning aid.
Features :
+ Save and load tuning files so that a piano does not have to be remeasured every time it is tuned
+ Pitch raise mode, which calculates the overpull for an initial "rough" tuning in the first pass (for pianos that are extremely flat)
+ Custom tuning styles: Create a custom tuning curve by adjusting the interval weighting and stretching
+ Access to all future functions and improvements
+ Tuning function only for the middle range of the piano
+ Automatic note recognition
+ Ability to measure every note on the piano to see how the current tuning compares to the ideal tuning curve (check if a piano is roughly in tune).
+ Swipe in the graphics area to view a live frequency spectrum or the inharmonicity of the measured notes.
Required Android Versions : KitKat [4.4–4.4.4] - Lollipop [5.0–5.0.2] - Marshmallow [6.0 - 6.0.1] - Nougat [7.0 – 7.1.1] - Oreo [8.0-8.1]