Comparison

SessionBand Jazz 4 vs Altered#

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

Head to head
About

SessionBand Jazz 4

Create professional-quality jazz music with royalty-free loops performed by renowned jazz musicians. Easily build tracks, transpose, and export your creations. Ideal for songwriters and musicians looking to jam or practice.

Highlights
  • Chord-based loops by top jazz musicians
  • 150+ downloadable jazz standards
  • Instant PDF chord sheets
  • Track Builder for faster workflow
  • 8 jazz styles and 20 drum grooves
  • Mute instrument channels
  • Copy to other music apps
Read full description

Create professional quality jazz tracks to your own chords in minutes with this brand new edition of the award-winning SessionBand jazz app featuring exclusive, royalty-free, chord-based loops performed by 4 of the world's top jazz musicians: Jason Rebello (Piano); Jeremy Stacey (Drums); Patrick Clahar (Sax) and Geoff Gascoyne (Bass). Volume 4 is the ultimate jazz play-along and the perfect tool for jazz songwriters. And we have added loads of extra features and tech improvements since Volumes 1, 2 and 3. Here's what you get: 1. 15 chord variations per root note! From straight major and minors right through to the most exotic jazz chords 2. 20 alternative drum grooves/fills in each style 3. Free access to over 150 downloadable jazz standards ready to play along to in any key! 4. Instant PDF chord sheets for the tracks you create 5. New tech enhancements like 'Track Builder' to make the workflow even faster. With over 15,000 precision-cut, chord-based loops included in the download, the app instantly converts the chords you select into great sounding, royalty-free audio - wherever you are and whatever your ability. For this long-awaited edition, we have gone back to mostly classic jazz with a couple of contemporary styles. Among the classics, expect to hear medium, post-bop Wayne Shorter swing styles in four and three, plus Wes Montgomery and Ahmad Jamal-inspired up-tempo swing styles. There's a contemporary Brad Mehldau-type piano and string style in 5/4 and a wonderful carnival-like worldbeat Cuban number with many rich, melodic tenor sax loops to choose from. Create professional jazz tracks to your own choice of chords in minutes. Everything you need to create, share and publish thousands of stunning royalty-free jazz tracks. Hear the results. Watch the video at www.sessionbandapp.com The fastest way to create your own studio-quality jazz: • Pick one of 8 jazz styles • Choose your chords • Stretch or shorten loops • Build up your track in minutes • Instantly hear your track across different styles and tempos • Auto-transpose your entire track • Add FX • Mix • Change tempo • Record direct to audio • Copy straight to other music apps • Share with the world! The ultimate mobile jam/practice tool for musicians: • Practice with your own world-class quartet • Loop markers let you focus on specific sections • Mute instrument channels as you like • Produce PDF chord sheets for the tracks you create...instantly • 'Flip' your track across other styles and tempos • Transpose your whole track instantly • Download backing tracks for over 150 jazz standards for free (with chord sheets) ready to play. Transpose them with just one touch! Get some of the world's best jazz musicians playing on your tracks: • Jason Rebello (Piano): Sting; Jeff Beck; Wayne Shorter; Peter Gabriel... • Jeremy Stacey (Drums): Noel Gallagher's High Flying Birds; King Crimson; Amy Winehouse; Take That; Eric Clapton... • Patrick Clahar (Sax); Bill Bruford's Earthworks; Incognito; Stevie Wonder; James Brown... • Geoff Gascoyne (Bass); Sting; Van Morrison; Guy Barker; Georgie Fame... You don't have to be a musician to create seriously good music and release it royalty-free! • Simple, intuitive interface • Audition the loop you are about to insert • ‘Track Builder’ allows simple creation of a full track • Intuitive mixing and record functions Detailed Product Information: • 8 classic and contemporary jazz styles: Elvin Swing; McCoy Three; Mozambique; Sting Swing; Latin Strings; Classical Five; Swing Bass; Up Swing Strings • Tempos from 107bpm to 190bpm • 15 chord variations for every root note: maj; maj7; maj7(#11); 11; 7; 7(b9); 7(#9,#5); 7(#11); min; m(#5); m7(9); m(maj7); m7(b5); dim; maj ‘stop’ • 20 alternative drum grooves/drum fills in every style in addition to the main drum groove • The musical content in this app cannot be found in any of the other SessionBand apps • All loops are offered royalty-free and can be used freely in your own works

About

Altered#

Features
Read full description

If you are a serious musician, you are supposed to answer "What is the 7b of D?" It's C, of course. But, were you fast enough? you know, if playing in a gig you are required to think fast... Try Altered#

Screenshots

SessionBand Jazz 44 screens
Altered#3 screens

Verdict

The call

The clearest difference is price: Altered# at Free against SessionBand Jazz 4's $5.99. Altered# also leads on update cadence (every 5 days vs every 6 months). SessionBand Jazz 4's advantage is iOS requirement (12.0 vs 15.4). 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

Altered# is free to download; SessionBand Jazz 4 costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SessionBand Jazz 4 ships an update every 6 months, Altered# every 5 days. The most recent releases landed on September 15, 2026 and May 16, 2026 respectively.

Scorecard3 real differences · 7 level
SessionBand Jazz 4 versus Altered#: the parameters behind the verdict, then further details
ParameterSessionBand Jazz 4Altered#
Price$5.99Free — better
Rating4.6 (28 ratings) — better—
Positive reviews63.2% of reviews—
Number of ratings28 — better—
Update frequencyEvery 6 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.4
Further details — not scored
Size688 MB10 MB
Age rating4+4+
DeveloperUK Music Apps LtdLuca Rocchi

In-app purchases

None

SessionBand Jazz 4

No in-app purchases

None

Altered#

No in-app purchases

Questions

Is SessionBand Jazz 4 free?
SessionBand Jazz 4 costs $5.99, with no in-app purchases.
Is Altered# free?
Altered# is free to download, with no in-app purchases.
Do SessionBand Jazz 4 or Altered# have ads?
Neither SessionBand Jazz 4 nor Altered# shows ads.
Which is updated more often, SessionBand Jazz 4 or Altered#?
SessionBand Jazz 4 ships an update every 6 months, and Altered# every 5 days. Most recently, SessionBand Jazz 4 was updated on September 15, 2026 and Altered# on May 16, 2026.

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