Quartet 6 vs Otoo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Live jazz standards play-along
- Mute instrument tracks
- Adjustable tempo and key
- Looping practice sections
- Animated chord diagrams
- Multitrack audio export
- Royalty-free content
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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…
Otoo
This music creation app offers a unique free-form sequencer for building beats and melodies. It supports built-in sounds, sampling, and AUv3 instruments, with live performance effects and song arrangement tools.
- Free-form step sequencer
- Single-screen workflow
- Built-in sounds and sampler
- AUv3 instrument support
- Performance Mode effects
- Export WAV, MP3, and MIDI
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Otoo is a streamlined, one-screen groovebox designed for frictionless music production. Built around an innovative free-form step sequencer, Otoo breaks away from rigid grids, allowing you to place, drag, and stack notes freely across independent rows. Whether you are sketching out ideas using the native built-in engine and sampler or hosting your favorite third-party AUv3 plugins, Otoo delivers a distraction-free environment that prioritizes speed and musical flow. On iPhone, the interface dynamically scales to give your AUv3 instruments a near-fullscreen home, paired with a compact, highly responsive keyboard for immediate creation on the go. Otoo also includes Otoo MIDI, an AUv3 MIDI processor version of the app. It brings Otoo’s pattern-based sequencing into compatible AUv3 hosts, where playback follows the host timeline and instruments are routed as MIDI Out destinations instead of audio instruments. Distraction-Free Workflow • The single-screen layout keeps your sequence, arrangement and mixer visible at all times so you never have to dive into menus. • A free-form step sequencer lets you place, drag, and stack notes across any row without rigid instrument or track restrictions. • Step editing mode gives you precise control over note length, velocity, and timing subdivisions. • The gesture-driven mixer allows for quick volume adjustments, muting, and soloing directly from the main grid. • 4 rows on iPhone and 5 on iPad, with multiple instruments available in each row at different steps • 2-octave keyboard for playing and learning real notes Sounds and plug-ins • Up to 8 instruments per project • Built-in sounds and sampler • Use any installed AUv3 instruments in a large, near-fullscreen view with a compact keyboard • Up to 2 AUv3 effects per instrument • Sampler with instant key-by-key recording and chromatic mapping Patterns to full songs • Build songs from simple patterns • Draggable loop markers for quick arrangement changes Performance mode • Live sequencer and audio effects such as reverse, beat repeat, randomize, swing, triplet, tape, and more • Play the pattern like a keyboard by tapping steps directly Other features • Main output with built-in level protection • Automatic metronome when recording live into empty patterns • Export patterns or full songs as WAV or MP3 for easy sharing • Export performances as perfect loops • MIDI export • Supported time signatures: 4/4, 3/4, 4/4T and sequencer swing.
Screenshots
Verdict
The clearest difference is price: Otoo at $6.99 against Quartet 6's $16.99. Otoo also leads on update cadence (every 6 days vs every 2 weeks). Quartet 6's advantage is chart position (#112 vs unranked). On rating, review sentiment, ratings volume and ads 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
Quartet 6 costs $16.99 and Otoo $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Quartet 6 against 5.0 for Otoo. Both are backed by a comparable volume of ratings — 24 and 30 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Quartet 6 ships an update every 2 weeks, Otoo every 6 days. Both last shipped on October 28, 2026.
| Parameter | Quartet 6 | Otoo |
|---|---|---|
| Price | $16.99 | $6.99 — better |
| Rating | 5.0 (24 ratings) | 5.0 (30 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 24 | 30 — better |
| Update frequency | Every 2 weeks | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #112 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 15.6 — better |
| Further details — not scored | ||
| Size | 522 MB | 64 MB |
| Age rating | 4+ | 4+ |
| Developer | UK Music Apps Ltd | BeepStreet |
Customer experience
Quartet 6
Otoo
In-app purchases
Quartet 6
No in-app purchases
Otoo
No in-app purchases









