Songwriter's Calculator

If Reaper and that music theory book you have in your basement had a child.

Songwriter's Calculator Version 3.0

Our most capable version yet. Build demos faster than ever before. We happily welcome user feedback and suggestions for features. Help us sculpt the perfect music app.

TUNER: "Am I in tune?" 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: "What chord is this even?" 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: "What key am I in?" 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: "Okay, so I've got this idea…" This is the one we obsessed over and will continue to improve for the foreseeable future. We put serious work into the noise cancellation and latency so multitrack recording just works, with wired headphones, AirPods, or no headphones at all. On the rare take where timing drifts, the nudge tool slides it back into place.

Use our novel Key/Chord Guesser estimates 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. Play and record them with high-quality Upright Piano, Nylon-String Guitar, Electric Organ, Synth Strings, Xylophone, and a full drum kit.