Comparison

EGK CTransposer vs Quartet 6

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

EGK CTransposer

Features
Read full description

EGK CTransposer is a powerful chord transposition and composition tool designed for musicians, composers, and songwriters. Whether you're writing a new song, adjusting for vocal range, or learning chord progressions, this app simplifies the entire process. Easily input a single-line chord progression or paste full lyrics with embedded chords using Chord Sheet Mode. The app intelligently detects chords using regex and instantly transposes them by any number of semitones, with support for sharps, flats, and minor chords. Visualize the first chord with built-in fretboard diagrams, and hear how it sounds with real-time audio playback using tone synthesis. Save and manage your favorite chord progressions, or export the transposed result as a .TXT file for sharing, printing, or rehearsal use. Whether you're practicing, performing, or composing, EGK CTransposer brings convenience and inspiration to your musical workflow — powered by EGK Innovation.

About

Quartet 6

Enhance your jazz performance with a vast library of live-recorded standards. Mute your instrument to play along, change keys, adjust tempo, and loop sections for focused practice. Features animated chord diagrams and royalty-free multitrack exports for further development.

Highlights
  • Live jazz standards play-along
  • Mute instrument tracks
  • Adjustable tempo and key
  • Looping practice sections
  • Animated chord diagrams
  • Multitrack audio export
  • Royalty-free content
Features
Currently charting
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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 standards play along apps just got even better. No subscriptions. No in-app purchases. Quartet Volume 6 includes another 100 stunning jazz standards recorded exclusively by 5 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 either preset mixes (8 per song) 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 enabling different mixer channel settings for each song repeat. 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. Finding songs is easy with the ‘Search+’ feature. Search the entire Quartet song library (700 songs) by composer, style, BPM, associated artist and more. Build and share stunning multi-app playlists and easily export PDF chord charts for every song. Export your stereo mix or export the multitrack if you want to remix or 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. Quartet Volume 6 includes jazz improvisations in the style of… ‘Afternoon in Paris’, ‘Ain’t She Sweet’, ‘All The Things You Are’ (3/4 and 5/4), ‘Autumn Leaves’ (3/4, 7/4 and Bossa), ‘Epistrophy’, ‘Giant Steps’ (Bossa), ‘Groovin’ High’, ‘I Got Rhythm’ (Latin), ‘Let’s Get Lost’, ‘Mas Que Nada’, ‘Milestones’, ‘Mo’ Better Blues’, ‘One For My Baby’, ‘Stormy Monday’, ‘Tricotism’, ‘Try a Little Tenderness’, 'Vivo Sonhando’ plus 80 more songs! 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 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]. Saxophones /Flute Andy Panayi Performing and recording credits include Shirley Bassey, Jessye Norman, Paul McCartney, Seth MacFarlane, Elaine Paige, Salena Jones, Elvis Costello, Georgie Fame, Irene Reed, Elaine Delmar, Helen Shapiro, Madeline Bell, Patty Austin, Freddie Hubbard, Wynton Marsalis, Joe Lovano, Roy Hargrove… Piano Graham Harvey Credits include Incognito (MD), Stacey Kent, George Benson, M People, Hamish Stuart, Will Lee, The Jones Girls, Philip Bailey, Chaka Khan, The BBC Big Band, Omar, Madeline Bell, Jocelyn Brown, Mica Paris, Kenny Thomas, 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, Bob Dorough, John Martyn, Claire Martin, Eartha Kitt… Drums Sebastiaan de Krom Credits include Herbie Hancock, John Scofield, Phil Woods, Dave Holland, Jamie Cullum, Guy Barker, Wynton Marsalis, Clark Terry, Tim Garland’s Big Band…

Screenshots

EGK CTransposer4 screens
Quartet 64 screens

Verdict

The call

The clearest difference is price: EGK CTransposer at $3.99 against Quartet 6's $16.99. Quartet 6's advantage is update cadence (every 2 weeks vs every 7 months) and chart position (#111 vs unranked). On ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

EGK CTransposer costs $3.99 and Quartet 6 $16.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

EGK CTransposer ships an update every 7 months, Quartet 6 every 2 weeks. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 7 level
EGK CTransposer versus Quartet 6: the parameters behind the verdict, then further details
ParameterEGK CTransposerQuartet 6
Price$3.99 — better$16.99
Rating—5.0 (24 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—24 — better
Update frequencyEvery 7 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
Best chart rank—#111 — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.516.6 — better
Further details — not scored
Size5 MB522 MB
Age rating4+4+
DeveloperIsaac Eng Gian KhorUK Music Apps Ltd

In-app purchases

None

EGK CTransposer

No in-app purchases

None

Quartet 6

No in-app purchases

Questions

Is EGK CTransposer free?
EGK CTransposer costs $3.99, with no in-app purchases.
Is Quartet 6 free?
Quartet 6 costs $16.99, with no in-app purchases.
Do EGK CTransposer or Quartet 6 have ads?
Neither EGK CTransposer nor Quartet 6 shows ads.
Which is updated more often, EGK CTransposer or Quartet 6?
EGK CTransposer ships an update every 7 months, and Quartet 6 every 2 weeks. Most recently, EGK CTransposer was updated on October 10, 2026 and Quartet 6 on October 25, 2026.

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