The Real Deal for Piano Tuning If you would like to attempt to tune a piano with an Android device, then this is the app to use. Inharmonicity calibrations are made by measurements of the fundamental tone and the 2nd partial. The app allows saving 5 custom stretch tables for individual instruments. The "strobe" is easy to read, and appears to be a good combination of sensitivity and averaging. The degree of accuracy may depend on your device, so fortunately a demo version is available here. Considering what a dedicated tuning instrument with custom software of this caliber would cost, $5 is a steal. Note: On my phone, the app would not defeat the system display sleep, so it was necessary to set it to 30 minutes so as not to be interrupted during tuning.
Improved Note Tracking Stability, particularly for the low strings of Guitar and Bass, as well as for low end of Piano.
New Fundamental Indicator Tic on the Spectrum Display designates input Fundamental Note and Octave directly.
New Button in Setup Pages links to online Detailed Operation Manual.
Fixed lowest octave Strobe Display bug.