pitcher changes the key of any song while the tempo stays exactly the same. Move music up or down by anything from a full octave to a single cent, find the key with the built-in tuner, practice with loops and slower speeds, and save the version you need as a file. Made for singers who want a song in their range, players who need to match a recording or an instrument, and anyone learning a piece by ear. Change the pitch - Slide up or down on the screen and hear the change as the song plays. - Step by 1, 10, or 100 cents, type an exact value, or snap to semitones. - The interval is spelled out as you go, for example "up a minor third". Find the key - The tuner names the note at the playhead or at a bookmark, with its exact cents. - Choose the note you want and apply the interval in one tap. Practice - Loops for the passages you work on, repeated one at a time or in sequence. - Named bookmarks shown on the waveform. - Play speed from half to double, without changing the pitch. - Zoom the waveform, and let it follow the playhead. Keep and save - Keep the pitches you like on a shelf and switch between them with a tap. - Kept pitches are prepared in the background, so saving is quick. - Save or share as WAV, MP3, M4A, or Opus, the whole song or only your loops, at normal speed or at your practice speed. - Files sound exactly like the preview, because both use the same engine. Private by design - No network permission. Nothing leaves your phone. - No account, no ads, no tracking. - Import audio or video files, or share one in from another app. A short guided tour shows every control the first time you open a song. pitcher is free and open source software (GPL-3.0).