Comparison

Scales Lexicon vs iImprov

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

Head to head
About

Scales Lexicon

This app provides a comprehensive library of musical scales with notation and audio playback. It offers transposition for various instruments and clefs, customizable rhythmic patterns, and the ability to export notation as PDFs. Practice scales with visual feedback on highlighted notes and piano keys.

Highlights
  • Over 100 musical scales
  • Audio playback with visual note highlighting
  • Transposition for multiple instruments and clefs
  • Customizable rhythmic patterns and octaves
  • PDF export of notation
  • Forward and backward scale playback
Read full description

Over 100 scales notated and played for you, including note names, diatonic and melodic intervals. Transposition for instruments in Ab, Eb, Bb, F, C, G, D, A, and E. Play along! Create a pdf of the notation and piano key markings for sharing or printing. Listen and watch the notes and piano keys highlight as it plays. Notation in treble, alto, tenor or bass clef. See the scale notated correctly, with double sharps and flats as needed. For example, Gb minor has a B double flat, not an A. Concert key signatures are supported to the common seven sharps or flats. Transposing key signatures can contain twelve sharps or flats or if selected, use the preferred enharmonic equivalent. Have the scale played in a wide variety of ways. • Choose from 11 rhythmic patterns. • Choose 1, 2 or 3 octaves. • Loop continuously, or play just once through. • Select the space between each loop. • Choose if you want the scale played forward and backward (up and down), or just forward. • Includes an optional 2 or 4 beat count-off. Drive your own software or hardware synth via MIDI to hear what you want, or use the app's own acoustic piano. A quick and easy reference tool for practicing your instrument. Broaden your knowledge and technique. Included scales: • Common: Major Natural Minor Harmonic Minor Melodic Minor - Up & Down Whole-Half Diminished Half-Whole Diminished Whole-tone Chromatic • Modes: Ionian Dorian Phrygian Lydian Mixolydian Aeolian Locrian • Jazz: Major Pentatonic Minor Pentatonic Blues Blues Modified Blues Phrygian Blues Diminished Bebop Bebop Major Bebop Dominant Bebop Minor Bebop Minor 2 Harmonic Major Phrygian Dominant Lydian Dominant (Overtone) Lydian Augmented Augmented Half Diminished 1 Half Diminished 2 Diminished Whole Tone 6th Mode of Harmonic Minor Neapolitan Major Neapolitan Minor Harmonic Neapolitan Minor Prometheus • Hindustani Thaats: Bilawal Kalyan Khamaj Bhairav Poorvi Marwa Kafi Asavari Bhairavi Todi • World: Algerian Arabian Byzantine Hawaiian Hindu Hungarian or Egyptian Indian Indian Minor Jewish or Spanish Oriental Persian Romanian Bocovia Romanian Major Romanian Minor • China: Bi Yu Chaio Kung Youlan • Japan: Han-kumoi Hira-joshi Honchoshi Plagal Form Iwato Kokin-joshi, Miyakobushi Nohkan Ritsu Sakura Pentatonic Sansagari Taishikicho, Ryo • Composers: Prokofiev Scriabin Shostakovich Verdi Enigmatic Verdi Enigmatic - Up & Down • Messiaen Modes: Mode 1 - Whole Tone Mode 2 - Half-Whole Diminished Mode 3 Mode 3 Inverse Mode 4 Mode 4 Inverse Mode 5 Mode 5 Inverse Mode 6 Mode 6 Inverse Mode 7 Mode 7 Inverse Truncated Mode 2 Truncated Mode 3 Truncated Mode 3 Inverse Truncated Mode 5 Truncated Mode 5 Inverse Truncated Mode 6 Truncated Mode 6 Inverse

About

iImprov

This app helps jazz musicians of all levels master modal improvisation. It offers detailed explanations of theory, scale relationships, and practical exercises with audio and JAM-A-longs in various keys and styles. Tailored for modal tunes, it covers minor modal, 7 sus 4, and Major 7#4 progressions.

Highlights
  • Modal improvisation theory
  • Scale and chord relation explanations
  • Pentatonic scale usage
  • Audio and visual scale examples
  • Interactive JAM-A-longs
  • Adjustable tempo and instrument balance
  • Transposition selection
Features
Read full description

iImprov-Modal is the 2nd release from Jazz Apps Mobile LLC. It is part of a series created for jazz musicians of all levels to help them take on specific challenges that any improvising musician will encounter. Each one contains a full explanation of all the concepts and theory involved as well as written and audio examples and exercises. Each app contains JAM-A-longs in all keys with adjustable tempo and control of instrument balance. Each iImprov app also allows you to select the correct transposition for your instrument. iImprov-Modal specifically provides the tools for confidently playing over modal tunes. The main focus of the app is playing over minor modal tunes, however we have also covered playing over 7 sus 4 modal tunes and Major 7#4 tunes. Exercises and JAM-A-longs specific to each of these types of tunes are included. Features- Full explanation of the concepts involved. Detailed theory of note to chord relations and use of modal scales. Detailed theory of how to use pentatonic scales, including how to play “outside.” Audio and visual representation of the related scales. Audio playback of the scales played over the appropriate chords. Exercises that include live audio examples from saxophonist Tony Bray. JAM-A-longs for Minor Modal (Swing and Funk). JAM-A-longs for 7 sus 4. JAM-A-longs for Major 7#4. Each JAM-A-long was recorded individually in order to give variation for each key. Mixer control for the JAM-A-Long instruments. Tempo control for each JAM-A-long. Unlimited JAM-A-long loop length.

Screenshots

iImprov4 screens

Verdict

The call

The clearest difference is rating: Scales Lexicon at 5.0 against iImprov's 3.0. Scales Lexicon also leads on review sentiment (86% vs 68%) and price ($2.99 vs $3.99). iImprov's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 26.5). On ratings volume, update cadence, ads and in-app purchases 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

Scales Lexicon costs $2.99 and iImprov $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Scales Lexicon holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews point the same way: 86% of Scales Lexicon's written reviews are positive against 68% of iImprov's.

UpkeepUpdate frequency

Scales Lexicon ships an update every 24 months, iImprov every 28 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

Scorecard5 real differences · 5 level
Scales Lexicon versus iImprov: the parameters behind the verdict, then further details
ParameterScales LexiconiImprov
Price$2.99 — better$3.99
Rating5.0 (5 ratings) — better3.0 (2 ratings)
Positive reviews85.7% of reviews — better68.2% of reviews
Number of ratings5 — better2
Update frequencyEvery 24 months — betterEvery 28 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS26.515.6 — better
Further details — not scored
Size40 MB8 MB
Age rating4+4+
DeveloperPatrick Q. KellyJazz Apps Mobile LLC

Customer experience

Scales Lexicon

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews14 reviews
Positive85.7%
Neutral7.1%
Negative7.1%

iImprov

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews22 reviews
Positive68.2%
Neutral4.5%
Negative27.3%

In-app purchases

None

Scales Lexicon

No in-app purchases

None

iImprov

No in-app purchases

Questions

Is Scales Lexicon free?
Scales Lexicon costs $2.99, with no in-app purchases.
Is iImprov free?
iImprov costs $3.99, with no in-app purchases.
Which has better reviews, Scales Lexicon or iImprov?
Scales Lexicon is rated higher. Scales Lexicon averages 5.0 out of 5 from 5 ratings, while iImprov averages 3.0 from 2 ratings.
Do Scales Lexicon or iImprov have ads?
Neither Scales Lexicon nor iImprov shows ads.
Which is updated more often, Scales Lexicon or iImprov?
Scales Lexicon ships an update every 24 months, and iImprov every 28 months. Most recently, Scales Lexicon was updated on November 1, 2026 and iImprov on November 6, 2026.

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