# Pocket Theory: Chords & Scales — Music theory & chord finder > Music theory & chord finder (iPhone/iPad app by Chan Dick.) - Source: https://appshunter.io/ios/app/pocket-theory-chords-and-scales/id6824463992 (this page in markdown: same URL + `.md`) - Developer: [Chan Dick](https://appshunter.io/developer/6789264556) - Category: Music, Education - Price: Free - Age rating: 4+ - Requires: iOS 15.0 · 6 MB - Languages: American English - Released: 2026-11-02 - Data updated: 2026-11-10 ## What is Pocket Theory? The music theory app you can wander through. Every scale, chord and mode, and how they connect. TAP ANYTHING TO EXPLORE IT Every chord, scale, key and note you see opens with one tap. Open a chord and see the keys it lives in, the scales built around it and what to swap it for. Tap any of them and keep going: from a chord to its key, to a mode, to the one note that gives the mode its sound. Start anywhere and follow your curiosity. CHORD FINDER Tap the notes you're holding on the piano or the guitar neck. Pocket Theory names the chord, shows the chords one note away, and lists every scale those notes fit. Each answer opens its own page. Found a chord you like? Save it and give it a name. A TUNER THAT LISTENS Tune your guitar, bass, voice or any instrument through the microphone. The chromatic tuner shows the note, how many cents sharp or flat you are, and which way to go. Tuning to something other than A = 440? Change the reference pitch. GUITAR CHORD SHAPES With the guitar on, chord pages show playable shapes for that chord, worked out for every root. Swipe through them and tap one to hear it strummed. HEAR WHAT MAKES A MODE Hold a drone under any mode and play it over the top, then compare it with the scale it comes from. The notes that give it its sound are held and lit as they play. EVERY KEY, EVERY CHORD IN IT Key pages show the chords of the key and what each one does: home, leads away, pulls home. Secondary dominants, borrowed chords, and twelve progressions to play. Every scale names its relative and parallel major or minor. PROGRESSION BUILDER Pick a key and tap chords to build a progression: the key's own chords, borrowed chords and secondary dominants, or start from a classic like the 12-bar blues. Loop it at your tempo, see each chord on the piano or guitar as it plays, and save it with a name. 66 SCALES, 42 CHORDS, EVERY ROOT Major and its modes, melodic and harmonic minor, pentatonics, blues, bebop and scales from around the world. Triads to thirteenths, with their inversions. Each comes with a short line on how it sounds and where you'll hear it. PIANO OR GUITAR See it all on a keyboard, a fretboard or an upright neck, with note names or scale degrees. Left-handed guitar included. SAVE, SEARCH, SHARE Star any page to keep it, search by name, and pick up again from Recently opened. Share any page as a link: it opens in a web browser, no app needed. MAKE IT YOURS Choose which sections show, fold away or hide on each kind of page. Two layouts, six looks and 42 color palettes. IN YOUR POCKET The tuner, a metronome and tap tempo are one tap away on every page. Sound plays with the silent switch on. Works offline, with no account. ## Is Pocket Theory safe? Not enough ratings yet to assess Pocket Theory. ## Is Pocket Theory legit? Pocket Theory: Chords & Scales appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Pocket Theory is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 3 releases) ### 1.0.2 — 2026-11-08 Chord shapes for every chord in a key. CHORD SHAPES IN "CHORDS OF THE KEY" • Key pages now have the same Shapes button as scale pages, next to Triads | Sevenths. Turn it on and every chord of the key shows as a shape instead of a play button, so you can see all seven chords of a key like G major at a glance. • With the guitar on, each chord shows a chord box, starting with the shape most players reach for. With the piano on, a small keyboard with the chord's keys lit. • Works for triads and sevenths. Tap a shape to hear it, tap a chord's name to open its page. • Each chord still says what it does in the key: home, leads away or pulls home. • One setting for both: turn Shapes on in a key and it's on in every scale too, and the other way round. Thanks for the feedback that shaped this update. ### 1.0.1 — 2026-11-08 Drums for the Progression builder, chord shapes for every chord in a scale, and a metronome you can set up your way. DRUMS IN THE PROGRESSION BUILDER • A new Drums row with the builder's other options: Off, Rock, Pop, Shuffle or Ballad. • Each style plays a kick, snare and hi-hat groove under your loop, locked to your tempo and to the time signature: 4/4, 3/4, 6/8 or 2/4. • Shuffle swings and Ballad plays softer. Change the style while the loop plays and you hear it from the next chord. • Shared links keep the drum style, so a progression you send plays the same for whoever opens it. CHORD SHAPES IN "CHORDS IN THIS SCALE" • Scale pages have a new Shapes button next to Triads | Sevenths. Turn it on and every chord of the scale shows as a shape instead of a play button, so you can see all seven chords of a scale like D Phrygian dominant at a glance. • With the guitar on, each chord shows a chord box. With the piano on, a small keyboard with the chord's keys lit. • Works for triads and sevenths. Tap a shape to hear it, tap a chord's name to open its page. THE MOST COMMON SHAPE FIRST • Every chord's guitar shapes now start with the one most players reach for: the open chord where there is one, otherwise the barre chord. F sharp minor starts with the 2nd-fret barre, B minor with the barre at the 2nd fret on the A string, B flat with the 1st-fret barre. • The other shapes follow further up the neck. METRONOME SETTINGS • A new settings button in the metronome window, and a Metronome settings button on the Settings page. Both open the same settings. • Sound: Click, Woodblock, Beep, Hi-hat or Cowbell. Tap one and you hear it once, so you know what you picked. • Subdivisions: Off, Eighths, Triplets or Sixteenths, with the clicks between beats softer than the beat. • Accent beat 1: on or off. • Flash on the beat: a pulse around the edge of the screen on every beat, stronger on beat 1, with the metronome window open or closed. • Top tempo: type the fastest tempo you want, from 60 to 2000 BPM (it used to stop at 250). The tempo slider and tap tempo go up to it. It starts at 350 so the slider stays easy to set, and you can raise it whenever you need more. • Every change is heard straight away, even while the metronome is playing. LOCK SCREEN AND CONTROL CENTER • The lock screen and Control Center now show what's playing, like "Metronome · 120 BPM", "Progression builder" or "Drone on D", with the Pocket Theory icon. Before, it said "localhost". • Pause it there and the app knows: the metronome, loop and drone show as stopped. Press play there to start it again. • The metronome and the Progression builder keep a steady tempo while the app is in the background, and changes you make when you come back are heard at once. FIXES • Double-tapping a button no longer zooms in, and pinching no longer zooms the page. • In the Mono look, the circle of fifths' outer ring no longer runs through the key letters. Thanks for the feedback that shaped this update. ### 1.0 — 2026-11-02 No release notes. ## More apps by Chan Dick - [One Shot Cascade: Blast Puzzle](https://appshunter.io/ios/app/one-shot-cascade-blast-puzzle/id6793209232) - [Supply Lines: War Strategy](https://appshunter.io/ios/app/supply-lines-war-strategy/id6800396190) - [Noctule](https://appshunter.io/ios/app/noctule/id6801569460) - [Squeeze the Orbs: Drop & Merge](https://appshunter.io/ios/app/squeeze-the-orbs-drop-and-merge/id6810222416) - [Lunar Aspect: Moon Planetarium](https://appshunter.io/ios/app/lunar-aspect-moon-planetarium/id6810260314) - [Approach: Air Traffic Control](https://appshunter.io/ios/app/approach-air-traffic-control/id6816013213) All apps by Chan Dick: https://appshunter.io/developer/6789264556 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-10.*