PRO = With no Ads. Tuner Wear use your device microphone record and convert the sounds to frequency to the nearest note for quick and easy tuning of your prefered instrument. Works on guitar, twelve string's guitar, bass, ukelele, violin, cello, viola, double bass, piano, harp, sitar, guqin, biwa, shamisen, sanshin, konghou, koto, etc. Features: Two decimal precision;