For iOS & Android

Slow it down.
Nudge the pitch.
Stay in tune.

TuneSlider changes a song's speed without changing its pitch, and its pitch without changing its speed — down to the cent. Built for practicing, transcribing, and slowing down the hard parts, without a subscription or a single ad.

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Google Play Coming to the
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Free. No account. No ads. Nothing leaves your device.
Three dials, one job each

Colour is the label

Speed, pitch, and fine tune are always independent — and always the same colour, everywhere in the app, so you never lose track of which one you're touching.

Speed

25%–200% of the original tempo in 1% steps. Pure time-stretch — the pitch never drifts, even at half speed.

Pitch

±6 semitones — a full octave of transposition, in whole-step jumps, without ever touching the tempo.

Fine tune

±50 cents around whichever semitone you've picked — enough resolution to correct a recording that's just a hair off, not just jump a whole key.

Built for repeat practice

Every song remembers its own settings

Real library features, not just a single-file player.

Per-song memory

Speed, pitch, and fine-tune are saved per song and restored automatically the next time you open it — across app relaunches, not just within a session.

Favorites & playlists

Heart a song to favorite it, or build named playlists — reorder, rename, and organize the pieces you're actively working on.

Play All & full transport

Queue an entire playlist and auto-advance through it, with back / rewind 15s / play-pause / forward 15s / next — on-screen and from the lock screen.

Keeps playing, locked or backgrounded

Full lock-screen and Control Center transport controls, and playback survives the screen locking or another app opening.

See the music, not just hear it

Three full-screen visualizers

Swipe in from Now Playing — each one is driven by the actual, live, post-speed/pitch audio, not a canned animation.

Waveform

Raw time-domain trace

Spectrum

FFT frequency bars

Pulse

Radial burst, by loudness

Nothing to sign in to. Nothing to send anywhere.

TuneSlider has no account, no analytics, and no ads. Every song, setting, playlist, and favorite lives only in local storage on your device — the developer never sees any of it.

Read the Privacy Policy