Comparison

Jazzhacker Scales for Guitar vs Impro Master

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

Head to head
About

Jazzhacker Scales for Guitar

This app provides a comprehensive visual reference for guitar scales and modes, featuring 340 illustrations with fretboard diagrams. Users can explore various scales and keys, create custom slideshows for practice, and utilize an adjustable metronome.

Highlights
  • 340 scale and mode illustrations
  • Guitar fretboard diagrams
  • Customizable slideshows
  • Adjustable metronome
  • Full-screen viewing
  • Support for all keys and scales
Features
Read full description

Scales and modes are crucial building blocks of western (occidental) music, including blues, classical, country, funk, hip-hop, jazz, Latin, heavy metal, pop, punk, rap, R&B, reggae, reggaeton, rock, ska, soul, trip-hop, … and beyond! Jazzhacker apps are practice, study, and reference guides for musicians of all abilities, playing any genre of music. Each title includes 340 illustrations of the most popular and useful scales and modes.  Each illustration displays pertinent info (name, formula, notes) about a scale or mode and a stylized guitar (or bass) fretboard showing the locations of all notes of the scale or mode on the fretboard (its pattern), all at a glance. Please see Jazzhacker.net for more info, including Jazzhacker ebooks. Select the icons (or scroll down) to view sample app pages: The user may select an image to view or select a standard slideshow to play, or build a custom slideshow, for practice or study or entertainment. Images and slideshows may be viewed in full-screen mode and run with or without the app's adjustable metronome. Scales and Modes: Major (Ionian), Whole-Tone, Lydian, Lydian Flat-Seven, Mixolydian, Major Pentatonic, Major Blues, Melodic Jazz Minor, Dorian, Harmonic Minor, Natural Minor (Aeolian), Diminished (Whole-Half), Diminished (Half-Whole), Super Locrian, Phrygian, Locrian, Blues w/Major Third, Minor Pentatonic, Minor Blues, and Half Diminished Scale and Mode Keys: C, C#, Db, D, D#, Eb, E, F, F#, Gb, G, G#, Ab, A, A#, Bb, and B Manual Operation: Select and display any scale or mode in any key Slideshows: • Play any scale or mode in all keys • Play all scales and modes in any key • Play all scales and modes in all keys • Select any images and add them to a custom playlist (slideshow) • Images and slideshows may be displayed in full-screen mode • Slideshow Rates: 5s, 10s, 15s, 30s, 45s, 1m, 5m, 10m, 15m, 30m, or 60m per slide Metronome: Select 30 to 200 BPM

About

Impro Master

This app helps musicians practice improvisation and compose chord progressions with AI-generated sequences and realistic instrument playback. It offers customizable parameters, various musical styles, and tools for both beginners and professionals.

Highlights
  • AI chord progression generation
  • Realistic instrument playback
  • 16 musical styles
  • Customizable parameters
  • Load and save progressions
  • Light & Dark Mode
Features
Read full description

Impro Master the ultimate way to practice improvisation and get inspired writing chord progressions. It creates random chord changes in different styles and also with aleatory metrics. All editable and customizable with incredible sounds and for all musical levels. From beginners to pros! MAIN FEATURES: * Realistic instruments playbacks with complexity & humanization sliders. 
Choose between acoustic piano, electric piano, Hammond organ, upright bass, electric bass. * 16 realistic styles to choose from. 
 * NEW! Use artificial intelligence to generate unique chord progressions, leveraging a vast dataset of over 2,000 chord progressions from Jazz and Pop Rock music. Enjoy full control over the creative process with multiple customizable parameters, shaping your music in countless ways. * Generate sequences via choosing combinations of roots & qualities. 
 * Generate sequences from modes and modal interchange values. 
 * Generate sequences from random combinations. 
 * Write your own chord progression from scratch. 
 * Combine aleatory metric for each progressions. Combinations of 2/4, 3/4, 4/4, 5/4, 7/4.
 * Acoustic and electric pianos & basses to choose from. 
 * Exercises and songs to choose from. * Load & Save your chord progressions. * Light & Dark Mode

Screenshots

Jazzhacker Scales for Guitar4 screens
Impro Master4 screens

Verdict

The call

The clearest difference is price: Impro Master at Free against Jazzhacker Scales for Guitar's $4.99. Impro Master also leads on update cadence (every 2 months vs every 9 months). On review sentiment, 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

Impro Master is free to download; Jazzhacker Scales for Guitar costs $4.99 up front. Jazzhacker Scales for Guitar sells 1 one-off in-app purchase and Impro Master sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Jazzhacker Scales for Guitar ships an update every 9 months, Impro Master every 2 months. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 7 level
Jazzhacker Scales for Guitar versus Impro Master: the parameters behind the verdict, then further details
ParameterJazzhacker Scales for GuitarImpro Master
Price$4.99Free — better
Rating—4.6 (46 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—46 — better
Update frequencyEvery 9 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size86 MB190 MB
Age rating4+4+
DeveloperJAZZHACKER LLCLuis Gimenez Alvarez

Customer experience

Jazzhacker Scales for Guitar

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Impro Master

All ratings46 ratings
Positive89.1%
Neutral4.3%
Negative6.5%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Jazzhacker Scales for Guitar

One-time1
  • Upgrade to add more scales$2.99
1 purchases

Impro Master

One-time1
  • Unlock the Full Version$6.99

Questions

Is Jazzhacker Scales for Guitar free?
Jazzhacker Scales for Guitar costs $4.99, and also offers in-app purchases.
Is Impro Master free?
Impro Master is free to download, with in-app purchases available.
Do Jazzhacker Scales for Guitar or Impro Master have ads?
Neither Jazzhacker Scales for Guitar nor Impro Master shows ads.
Which is updated more often, Jazzhacker Scales for Guitar or Impro Master?
Jazzhacker Scales for Guitar ships an update every 9 months, and Impro Master every 2 months. Most recently, Jazzhacker Scales for Guitar was updated on October 8, 2026 and Impro Master on October 15, 2026.