Chordio vs Quartet 3
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Chordio
This music composition and theory app helps musicians explore chords and scales interactively. It offers tools to create, store, and transpose chord progressions, with built-in sounds and MIDI controller support for real-time feedback. Ideal for producers, composers, and educators seeking creative inspiration.
- Chord progression generator
- Custom chord creation and editing
- MIDI controller integration
- Real-time chord name display
- Transpose chord progressions
- Music theory lessons and quizzes
- Printable sheet music export
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Looking for a spark for your upcoming song? Introducing Chordio, a powerful tool for composition and music theory that offers an enjoyable and interactive experience. This app allows you to explore chords and scales in a fun and engaging way. It also provides a convenient platform for storing all your distinctive musical chord progressions in a single location. As a result, Chordio becomes an indispensable resource for contemporary music producers, composers, and educators. Take your music theory knowledge to the next level and create innovative chord progressions for your latest composition. With a range of internal sounds included, you can explore the tool's features without needing any other external equipment. Connect your MIDI controller to Chordio and see chord names appear on the Grand Staff in real-time as you play. Solo over chord progressions using the built-in sounds, and quickly rearrange or transpose chord progressions on the fly for added flexibility. Uncover fresh chord sequences for any genre - from hip hop to house and everything in between. Simply drag and drop them into your DAW! Chordio empowers you to unleash your creativity and take your music to new heights. The main features are divided into four workspaces: Composition • Build-in sequencer to create chord progressions. • Build-in Chord progression generator. • Create custom chords, edit existing chords, get chord inversions, and extended chords. • Drag & Drop to change the song structure. • Transpose the entire chord progression with a single tap. • Create a playlist of custom chord progressions. • Chord Suggestion AI – Get intelligent chord recommendations that fit your existing progression, and seamlessly integrate them into your composition. • A Chord Types & Vocings panel helps you generate new chords. • Play-along with a backing rhythm track. • Save/load songs, export it as MIDl. • Download chord progressions from a growing collection of Chord Packs. Scales • Practice scales with a metronome in all keys. • Contains more than 40 scales you can work with. • Staff view for chords and scales. Modes • Interactive way to learn what scales are associated with each mode. • Practice modes in Chordio. • Change tonic, mode, and layout to discover the relationship between musical notes, chords, and scales. Music Theory * In-app theory lessons. • 3 New Music Theory Quizzes: Note Identification, Interval Recognition & Chord Identification. Sheet Music • Adjust the Tempo: Practice at your own speed. • Loop Key Sections: Focus on tricky parts with ease. • Practice Hands Separately: Work on left or right hand independently. • Play in Any Key: Transpose sheet music to suit your preference. • Customize Tracks: Adjust instrument volumes. • Jazz Solo: Jam over chord progressions. • Print Your Scores: Print a PDF version of the score for flexible, hands-on practice. Lessons • Learn to play songs at your own pace. • Download music from a growing collection of Lesson Packs. • Lessons can be slowed down or pitch changed. KEY FEATURES: • MIDI keyboard support. • Build progressions using the chord generators. • Export MIDI to your DAW or sequencer. • Custom chords, edit existing chords, get extended chords. • Play internal sounds. • Arpeggio, strum and performance modes. • Mac version include a detachable resizable Grand Staff, Chord Display, and Keyboard Views. • Customise the Keyboard highlight color. • Select chord, to display a range of related scales and chords. • Tap a note on the Grand Staff to highlight it with a color. • Choose from selection of backing rhythms that fit specific genres. • Chord Pattern playback Always backup your chord progressions!
Quartet 3
Enhance your jazz performance and practice with live studio recordings of jazz standards. Mute your instrument to play along, change keys, adjust tempo, and loop sections for focused learning. Features animated chord diagrams and playlist creation for seamless practice sessions.
- Live jazz standards play-along
- Mute your instrument
- Change key and tempo
- Loop sections for practice
- Animated chord diagrams
- Multi-app playlist creation
- Multitrack export
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Practice and perform jazz standards on another level with Quartet. And with a host of brand-new features, the top-selling jazz play along apps just got even better. No subscriptions. No in-app purchases. Volume 3 includes another 100 stunning jazz standards recorded exclusively by 6 of the world’s best jazz musicians. All ‘live’ studio recordings with intros, endings and top line solos. Whether you play jazz piano, guitar, saxophone, trumpet, bass, drums…simply mute your instrument from the Quartet for the ultimate jazz play along. And for jazz singers too, each edition of Quartet is an unrivalled collection of jazz backing tracks powerful enough to gig with. Change key on the fly. Speed up or slow down the audio seamlessly. Loop sections and slow them right down for practice. Select the number of repeats. Choose from preset mixes or create your own custom mix using the new onboard mixer. Arrange each song exactly the way you want it with the new automated ‘Arranger’ feature. Add a touch of reverb and you’re good to go. Improve your skills with full screen animated chord diagrams for Piano, Guitar and Ukulele. Search the entire Quartet song library (700 songs) by composer, style, BPM, associated artist and more. Build and share multi-app playlists and easily export PDF chord charts for every song. Export your stereo mix or export the multitrack if you want to develop the high quality separated parts in GarageBand or whatever DAW you use. Either way, all recordings are offered to you royalty-free giving you endless creative possibilities. The 100 jazz standards in Quartet Volume 3 include improvisations in the style of… ‘After You’ve Gone’, ‘Ain’t No Sunshine’, ‘At Last’, ‘Baubles, Bangles & Beads’, ‘Blueberry Hill’, ‘Blues’ (in all keys), ‘Breezin’’, ‘Chameleon’, ‘Down by the Riverside’, ‘Freedom Jazz Dance’, ‘How Long Has This Been Going On?’, ‘Ladies in Mercedes’, ‘On the Street Where You Live’, ‘Second Time Around’, ‘Someone To Watch Over Me’, ‘Summer Knows’, ‘Só Danço Samba’, ‘Too Marvelous for Words’, ‘Who Can I Turn To?’, ‘With a Song in My Heart’… and 80 more. Install Quartet on all of your iOS devices plus your Mac devices (M series only) at no extra cost. Ready to take your jazz standards to another level? Hear more at www.quartetapp.com Featured artists on Quartet Volume 3 Guitar Nigel Price Nigel has recorded with many big-name artists, performing on over 50 albums, most recently Van Morrison’s studio album ‘Keep Me Singing’. A former member of The James Taylor Quartet, Nigel was voted the UK’s ‘Best Guitarist’ in the 2016 British Jazz Awards and is “…probably the most dynamic and gifted guitarist on the British jazz scene today” [All About Jazz]. Trumpet Steve Fishwick Steve has performed and recorded with many leading European jazz musicians including Sir John Dankworth, George Mraz, Dado Moroni, Claus Raibler, Tony Lakatos and the WDR big band. In the USA, Steve has performed and recorded with Anita O' Day, Ron Carter, Jimmy Heath, Peter Erskine, Eric Harland, Scott Hamilton, Herb Geller Saxophones and Flutes Andy Panayi Credits include Shirley Bassey, Jessye Norman, Paul McCartney, Seth MacFarlane, Elaine Paige, Elvis Costello, Georgie Fame, Helen Shapiro, Madeline Bell, Patty Austin, Freddie Hubbard, Wynton Marsalis, Billy Cobham Piano Graham Harvey Credits include Incognito (MD), Stacey Kent, George Benson, M People, Hamish Stuart, The Jones Girls, Philip Bailey, Chaka Khan, The BBC Big Band, Madeline Bell, Jocelyn Brown, Mica Paris, Sir Cliff Richard Bass Geoff Gascoyne Credits include Jamie Cullum (MD), Sting, Van Morrison, Bill Bruford, Mari Wilson, Paloma Faith, Georgie Fame, Gloria Estefan, Guy Barker, Charlie Watts, Benny Golson, Jacqui Dankworth, John Martyn, Eartha Kitt Drums Sebastiaan de Krom Credits include Herbie Hancock, John Scofield, Phil Woods, Dave Holland, Jamie Cullum, Guy Barker, Wynton Marsalis
Screenshots
Verdict
The clearest difference is price: Chordio at Free against Quartet 3's $16.99. Chordio also leads on update cadence (every 8 days vs monthly). Quartet 3's advantage is review sentiment (90% vs 62%) and rating (4.7 vs 4.4). On ads, in-app purchases, monetization model and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Chordio is free to download; Quartet 3 costs $16.99 up front. Chordio sells 10 one-off in-app purchases and Quartet 3 sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Quartet 3 holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 8 and 24 respectively. Written reviews point the same way: 62% of Chordio's written reviews are positive against 90% of Quartet 3's.
Chordio ships an update every 8 days, Quartet 3 monthly. The most recent releases landed on November 11, 2026 and November 12, 2026 respectively.
| Parameter | Chordio | Quartet 3 |
|---|---|---|
| Price | Free — better | $16.99 |
| Rating | 4.4 (8 ratings) | 4.7 (24 ratings) — better |
| Positive reviews | 61.5% of reviews | 90.0% of reviews — better |
| Number of ratings | 8 | 24 — better |
| Update frequency | Every 8 days — better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPad, Mac | iPhone, iPad |
| Requires iOS | 17.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 205 MB | 528 MB |
| Age rating | 4+ | 4+ |
| Developer | One In A Billion Ltd | UK Music Apps Ltd |
Customer experience
Chordio
Quartet 3
In-app purchases
Chordio
- Free Chord PackFree
- Chord Progressions 251 No.1$2.99
- Jazz Progressions 01$5.99
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- Neo-Soul Progressions 01$5.99
- Neo-Soul Tunes 01$5.99
- RnB Chords No.1$5.99
- Classical Progressions 1$5.99
- II-V-I Progression$5.99
- RnB Progressions 01$5.99
- Unlock App$14.99
Quartet 3
- Upgrade song$0.99
- Buy 10 tokens$8.99
- Buy 20 tokens$14.99
Show 2 moreShow fewer
- Buy 50 tokens$22.99
- Upgrade all songs$39.99









