CHALLENGE
Chord Change Challenge
Pick 2–6 chords, set a strumming pattern and tempo, and practice daily. Watch your BPM climb and keep your streak alive.
Chordex: Guitar Chords
Chord library, theory & strums
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
You can look up any chord in seconds. But can you remember it, switch to it smoothly, and actually use it in a song? Chordex helps you truly learn your chords — the fingering, the theory behind it, and the muscle memory to play it. Fully offline. No ads. No account needed.
Chordex is a chord-learning companion built for guitar beginners and self-taught players. It's more than a chord lookup tool: it helps you understand the music theory behind every chord, so you go from just being able to play it to knowing how to use it.
CURATED CHORD LIBRARY No dumping thousands of diagrams on you with zero context. A hand-picked set of the essential voicings, organized by type — major, minor, seventh, suspended, and more — with every chord fully explained. Search by name or attribute (like "Cmaj7" or "sus"), and jump straight to everyday chords like C, G, Am, Em, and D with a single tap.
IN-DEPTH CHORD DETAILS Each chord comes with a fingering diagram and a full fretboard view. Tap to hear a realistic strum. See the chord's notes, its interval structure, and the role it plays in a key — plus the classic progressions it shows up in and suggestions for similar chords. Save your favorites and review anytime.
REVERSE CHORD LOOKUP Spotted an unfamiliar shape in a chord chart? Press the fingering onto the interactive fretboard, and Chordex instantly identifies the chords it could be. Preview the sound and tap through to the full details.
KEY EXPLORER Browse all 12 major keys arranged on the Circle of Fifths. View each key's scale and solfège, its diatonic triads and seventh chords, its chords grouped by tonic, dominant, and subdominant function, and the classic progressions that work in that key. Writing, playing by ear, or transposing — you'll know where you're headed.
CHORD CHANGE TRAINER Pick the chord transitions that trip you up, practice along with the beat, and turn chord switching into muscle memory.
CHORD OF THE DAY Get a new chord every day based on the date, complete with a short intro and key theory notes. Over time, you'll build your own personal chord dictionary.
STRUMMING PRACTICE Five practical strumming patterns built in: quarter-note downstrokes, folk starter, all-purpose folk, full eighth-note strum, and slow pop ballad. Each pattern loops alongside a rhythm diagram, with adjustable BPM and switchable practice chords. Ghost-strum explanations help you build a steady right hand.
CLASSIC CHORD PROGRESSIONS Nine timeless progressions, including the Canon progression, the pop four-chord loop, Doo-Wop, the jazz ii–V–I, and the blues. Loop them and strum along chord by chord until your ear knows the backbone of popular music.
THEORY ARTICLES Illustrated music-theory guides with chord diagrams, triad comparisons, and capo charts. Each article links directly to the chords and keys it covers, so you can read and practice at the same time.
MORE FEATURES
Realistic guitar strum sounds, with distinct up- and down-stroke direction and dynamics
Built-in music theory engine that parses chord names and derives chord tones and related chords
Favorites for building your own chord collection
Works fully offline — no internet, no sign-up, no ads
Whether you've just picked up a guitar or you're a singer-songwriter looking to fill in the theory gaps, Chordex is here to help you truly learn your chords — not just memorize them.
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Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
* UIUX improvement.
The developer, LIN TSO HSI, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- LIN TSO HSI
- Size
- 44.7 MB
- Category
- Music
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Traditional Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Chordex.