Piano Tuner(Home Edition)

This is the world's first piano tuner that can accurately and stably detect the full-range 88-key pitch deviation. With the impact piano tuning lever, the piano tuning will become very simple and efficient.
The app is relatively low cost. If you have one or two pianos and want to tune them by yourself, this app is the right choose.  If you tune more pianos, the developer's Piano Tuner Pro Edition app is more suitable.
By the free app, you can detect the piano tuning curve, tune all C and A2 keys,  and experience the product actually. In addition, when a tuning curve has been detected, you can evaluate simply how much your piano is out of tune. 
After the in app purchase, you can detect all notes for tuning a piano.
The Home edition app can store one tuning curve for each piano. You can detect tuning curve any times within 90 days of purchase. After that, every 90 days you can re detect tuning curve only one time. If the piano strings are not replaced, there is no need to re detect a tuning curve.

Features:
More than 0.1 cents detection accuracy.
The Unisons Tuning mode can further help piano tuning DIY.
The Full Range mode can reliably recognize the full range pitch of the piano and simplify the operation.±6 Semitone mode is relatively faster and has better anti-jamming ability, can adapt to the sound quality is not good and the noise environment. The Manual mode has the strongest anti-interference ability and the fastest response speed.
The tuning curve can be automatically estimated with just a few keys detected.
It is more direct and accurate to display the deviation value by numerical figure. This makes there no need to keep a close eye on the display screen when a piano key is struck, and the app will keep to display the detecting result after the end of the tone.
Detection is fast and reliable. When detecting bass tone, it is only about 3/4 seconds to start showing the results. The treble tone even if the time is very short, can be accurately detected. 
Can indicate whether there is a significant beat interference.
Only built-in microphone supported.