Pianowise: Piano Tuner

Pianowise is a piano tuner app made for pianos, with every key free. It listens to each key, measures how stiff your piano's strings are, and shows how far every note is from where it should be on your own piano. No paywall on the bass or treble, no account, no subscription. CHECK FIRST • Check the piano: play the highlighted key, and Pianowise records how far it is from its target and moves on. A quick check visits every third key (30 keys) in a few minutes; all 88 if you like. • See how many keys are in tune, whether the piano as a whole has dropped below pitch, and a keyboard coloured key by key. • Your checks are kept, so you can follow how the piano drifts between visits by your technician. MEASURED STRETCH, NOT A GUESS • Piano strings are stiff, so their overtones run sharp and good tunings are stretched: flat in the bass, sharp in the treble. A chromatic tuner ignores this. • Pianowise measures your strings' inharmonicity on six keys and computes each key's target from it, with gentle, standard or wide octaves. • The target curve and the measured stiffness are shown as charts, so you can see what the app is doing. MADE FOR PIANOS • Steady readings: three agreeing notes, partial by partial. • Reads the deep bass from its higher partials, where phone microphones hear poorly. • Unison beats shown when a note's strings disagree. • Says "that was another key" instead of reading the wrong note; refuses chords and clipped sound with a reason. • Big keyboard strip, previous/next, auto-advance, and Follow to read any key you play. • Hear each key's target through the speaker. YOUR PIANOS • Several pianos, each with its type, reference pitch (A4 = 415–446 Hz), octave style, measurements and history. • The date of the last professional tuning, to see drift since. • Backup and restore to a file: nothing is lost when you change phones. HONEST ABOUT WHAT IT IS Pianowise is for checking and touching up between visits by a piano technician. It does not replace their ear or their skill. The Guide explains unisons, pitch raises, safe use of a tuning lever, and when to call a professional. English, Spanish, French, German, Italian and Portuguese. Works offline. Sound is analysed on the phone, never recorded or sent. Free with ads; one optional purchase removes them, and every feature stays free either way.