Songwriter's Calculator

Our most capable version yet. Build demos faster than ever on everything from iPhone mini to iPad Pro. We happily welcome user feedback and suggestions for features. Help us sculpt the perfect music app.

TUNER

A pro-grade chromatic tuner with LED segments and a pitch-history strip. Guitar, bass, ukulele, violin, and chromatic, with an adjustable A4 reference. Built to get you from tap to tuned as fast as anything out there.

IDENTIFY

Build any chord and see it on piano and guitar at once, then hear it back with real instrument sounds. Don’t know the chord’s name? Just tap the notes on the piano or the fretboard and we’ll name it. Or strum your chord and let SWC try to identify it. Includes 30 solo styles with scale overlays on the fretboard.

CREATE

Add the chords you found and we’ll work out your likely key, then show you the chords, progressions, and scales that go with it. Everything you need to demystify the song stuck in your head.

RECORD

This is the one we obsessed over and will keep improving for the foreseeable future. We put serious work into cancelling speaker bleed and nailing latency so multitrack recording just works, with wired headphones, AirPods, or no headphones at all. Count yourself in with the metronome, keep a click in your headphones while you track, and on the rare take where timing drifts, the nudge tool slides it back into place.

Use our Key & Chord Finder to estimate your key and chords from a recorded take. Assign that key to your demo and the fun starts: clickable chords and notes, right in your key. Draw your own chords onto custom pads, or drop the chords we heard in your take straight onto them.

Play and record with Upright Piano, Nylon-String Guitar, Electric Organ, Xylophone, Strings (violin section, solo violin, and pizzicato), and a full drum kit. The Synth now comes with its own Lab (beta): drive, filters, envelopes, tempo-locked LFOs, a step modulator, and delay, and what you hear while you play is exactly what the take gets. Add reverb, distortion, or echo to any track, and lock an effect to a track so it survives your retakes.

PAINT

Build drums and melodies in the step sequencers and paint them onto a track. Painting listens to the take you already recorded and lays the beat on its timing, so you play first and the band falls in behind you. If a paint lands wrong, adjust it: choose the track it follows, hold one tempo or follow the take bar by bar, set a straight grid at any tempo, or put bar one exactly where your needle is. Every painted track adjusts on its own, so fixing the drums never moves the melody.
Start a demo from scratch or from a voice memo or audio file, mix down to a single file to share, and move a whole demo between devices as one project file. Plug in a USB audio interface to pick inputs, record in stereo, and monitor live, or a USB MIDI keyboard to play the instruments (both in beta).

No subscriptions, no ads, no accounts. One purchase, yours to keep as we continue to build. Join us today!