Comparison

SBL Groove Trainer vs Quartet 4

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

Head to head
About

SBL Groove Trainer

This app is a comprehensive practice toolkit for bass players. It offers a metronome, tuner, beat trainer, and a drum looper featuring live samples from professional drummers. Enhance your bass playing skills with realistic jamming and practice tools.

Highlights
  • Metronome
  • Precision tuner
  • Beat trainer
  • Drum looper with live samples
  • Practice with real musicians
  • Jam with famous drummers
Features
Read full description

The Groove Trainer from Scott's Bass Lessons (SBL) is not just another metronome app - it’s the ultimate bass player’s practice toolkit. Play along with real musicians, jam with famous drummers like Mark Guiliana and Nate Wood, and more. It's a precision tuner, beat trainer, and metronome - and the SBL Groove Trainer is also a drum looper packed with live samples from the hottest drummers on the planet. Every time you sit down to practice, the Groove Trainer is at your side with a power pack of tools to help level up your playing, quickly and easily.

About

Quartet 4

Practice and perform jazz standards with high-quality backing tracks. Mute your instrument, change keys, adjust tempo, and loop sections for focused practice. Features animated chord diagrams and royalty-free multitrack exports for further creative use.

Highlights
  • Live jazz backing tracks
  • Mute your instrument
  • Change key and tempo
  • Looping for practice
  • Animated chord diagrams
  • Multitrack export
  • Playlist creation
Features
Currently charting
Read full description

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 4 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 ‘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 (650 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 4 include improvisations in the style of… ‘Affirmation’, ‘Água de Beber’, ‘Alexander’s Ragtime Band’, ‘Blue in Green’, ‘Born to Be Blue’, ‘Cinema Paradiso’, ‘Chicken’, ‘Ev’ry Time We Say Goodbye’, ‘Feel Like Makin’ Love’, ‘Got a Match?’, ‘Here There and Everywhere’, ‘I Get a Kick out of You’, ‘It Ain’t Necessarily So’, ‘La Fiesta’, ‘Manhattan’, ‘Nothing Personal’, ‘Poinciana’, ‘Save Your Love for Me’, ‘Social Call’, ‘Surrey with the Fringe on Top’… 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 4 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, Chris Standring, Everything But The Girl, 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

SBL Groove Trainer3 screens
Quartet 44 screens

Verdict

The call

The clearest difference is price: SBL Groove Trainer at Free against Quartet 4's $16.99. SBL Groove Trainer also leads on in-app purchases (none vs 5) and rating (4.8 vs 4.6). Quartet 4's advantage is update cadence (every 5 weeks vs every 5 months) and chart position (#199 vs unranked). On review sentiment, ads, device support and iOS requirement 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

SBL Groove Trainer is free to download; Quartet 4 costs $16.99 up front. Quartet 4 sells 5 one-off in-app purchases. SBL Groove Trainer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SBL Groove Trainer holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: SBL Groove Trainer has 152 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 94% of SBL Groove Trainer's written reviews are positive against 89% of Quartet 4's.

UpkeepUpdate frequency

SBL Groove Trainer ships an update every 5 months, Quartet 4 every 5 weeks. The most recent releases landed on September 8, 2026 and September 27, 2026 respectively.

Scorecard7 real differences · 4 level
SBL Groove Trainer versus Quartet 4: the parameters behind the verdict, then further details
ParameterSBL Groove TrainerQuartet 4
PriceFree — better$16.99
Rating4.8 (152 ratings) — better4.6 (12 ratings)
Positive reviews94.5% of reviews — better89.5% of reviews
Number of ratings152 — better12
Update frequencyEvery 5 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterPaid
Best chart rank—#199 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better16.6
Further details — not scored
Size286 MB503 MB
Age rating4+4+
DeveloperDevine Music LimitedUK Music Apps Ltd

Customer experience

SBL Groove Trainer

All ratings152 ratings
Positive94.7%
Neutral1.3%
Negative3.9%
Written reviews109 reviews
Positive94.5%
Neutral3.7%
Negative1.8%

Quartet 4

All ratings12 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews19 reviews
Positive89.5%
Neutral5.3%
Negative5.3%

User reviews

SBL Groove Trainer

From 152 App Store ratings

What we love

  • 🚀 Excellent practice tool
  • 👍 Great variety of drum loops
  • 👍 Useful metronome and tuner features
  • 👍 Convenient all-in-one app
  • 👍 Impressive functionality

Room to improve

  • 🐛 Occasional crashes or glitches
  • 🐛 Compatibility issues on certain devices
  • 🔋 Drains battery quickly
  • 👎 Lack of Bluetooth support

Quartet 4

From 12 App Store ratings

What we love

  • 👍 Superb interface
  • 🎨 Accurately labels tracks by style
  • 🎶 Live instrument recordings
  • 🔀 Ability to separate and send tracks
  • 🎨 High-quality presentation and performance

Bugs and requests

SBL Groove Trainer

Reported bugs

3 issues
  • Grooves not loading after iOS update
  • Drone feature not working properly
  • Drum beats not loading on certain devices

Requested features

8 requests
  • Add visual tempo display
  • Include reggae and other genre-specific beats
  • Implement count-in feature
  • Add lights to indicate each beat
  • Integrate loop recording functionality
Show 3 more
  • Support for third-party hardware like iRig
  • Implement Dynamic Island support on iOS
  • Add timer or practice session tracking

Quartet 4

Requested features

1 request
  • More guitar in rhythm section for future volumes

In-app purchases

None

SBL Groove Trainer

No in-app purchases

5 purchases

Quartet 4

One-time5
  • Upgrade song$0.99
  • Buy 10 tokens$8.99
  • Buy 20 tokens$14.99
Show 2 more
  • Buy 50 tokens$22.99
  • Upgrade all songs$39.99

Questions

Is SBL Groove Trainer free?
SBL Groove Trainer is free to download, with no in-app purchases.
Is Quartet 4 free?
Quartet 4 costs $16.99, and also offers in-app purchases.
Which has better reviews, SBL Groove Trainer or Quartet 4?
SBL Groove Trainer is rated higher. SBL Groove Trainer averages 4.8 out of 5 from 152 ratings, while Quartet 4 averages 4.6 from 12 ratings.
Do SBL Groove Trainer or Quartet 4 have ads?
Neither SBL Groove Trainer nor Quartet 4 shows ads.
Which is updated more often, SBL Groove Trainer or Quartet 4?
SBL Groove Trainer ships an update every 5 months, and Quartet 4 every 5 weeks. Most recently, SBL Groove Trainer was updated on September 8, 2026 and Quartet 4 on September 27, 2026.

Other comparisons