Accurate Piano Tuner app analytics for December 21

Piano Tuner, so you can easily use the mobile phone to do tuning for your piano. Easy to use, precise instructions, it is your powerful piano partner. When you pluck at the key of your piano, it can automatically measure the pitch of the key, and through a variety of methods to indicate the accuracy of the pitch; addition, it can issue the standard sound of the keys, for you to tune through listening. Pitch indication accuracy 0.2 cents, A4 standard note adjustment range of 430 to 450Hz, accuracy 0.1Hz.