Jazz Scales Trainer vs OnKey
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Jazz Scales Trainer
Master jazz improvisation with play-along exercises focused on scales. Practice single scales and transitions, with customizable accompaniment beats and chords. Prepare for jam sessions by analyzing your favorite songs and selecting scale proposals for each chord.
- Play-along jazz scale exercises
- Scale transition training
- Customizable accompaniment beats and chords
- Song analysis for scale selection
- Instrument configuration (clef, pitch, range)
Read full descriptionHide full description
This app trains you on playing jazz solos with a variety of play-along exercises focused on jazz scales. Playing single scales as well as changing from scale to scale is trained. Various accompaniment beats and chords make practicing fun. Get ready for your next jam session by exercising your favorite songs. Listen and select from scale proposals for each bar of your song, after entering the song chords. Configure the app to adapt to your instrument (clef, pitch, range, etc.)
OnKey
This app generates readable, note-based exercises for practicing scales and chords. It's ideal for musicians of all levels looking for a focused and efficient way to improve their technique and theory knowledge without manual preparation.
- Generate note-based exercises
- Select scale or chord type
- Transpose to any key
- Set range and clef
- Choose from various patterns
- Add note names and time signatures
Read full descriptionHide full description
OnKey Scale Practice is a simple, effective tool that helps musicians practice scales and chords with clarity and focus. Just enter your preferences and instantly generate readable, note-based exercises—no more flipping through books or writing them out by hand. Perfect for warm-ups, technique drills, or theory work, whether you're a beginner or an advanced player. Features: Select your scale or chord type Transpose to any key Set your range and clef Choose from various patterns Add note names and time signatures Designed for flexibility. Built for clarity. For all instruments.
Screenshots
Verdict
Jazz Scales Trainer and OnKey both sit at 3.0 stars, but that hides the real split: 80% of Jazz Scales Trainer's written reviews are positive against 0% of OnKey's. Jazz Scales Trainer also leads on price ($2.99 vs $4.99). OnKey's advantage is update cadence (every 2 months vs every 22 months). On rating, ratings volume, 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
Jazz Scales Trainer costs $2.99 and OnKey $4.99 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 — 3.0 for Jazz Scales Trainer against 3.0 for OnKey. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews are what separate them: 80% of Jazz Scales Trainer's written reviews are positive against 0% of OnKey's.
Jazz Scales Trainer ships an update every 22 months, OnKey every 2 months. Both last shipped on November 3, 2026.
| Parameter | Jazz Scales Trainer | OnKey |
|---|---|---|
| Price | $2.99 — better | $4.99 |
| Rating | 3.0 (2 ratings) | 3.0 (2 ratings) |
| Positive reviews | 80.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 2 | 2 |
| Update frequency | Every 22 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.2 | 14.1 — better |
| Further details — not scored | ||
| Size | 8 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Martin Miller | Rea Meir |
Customer experience
Jazz Scales Trainer
OnKey
In-app purchases
Jazz Scales Trainer
No in-app purchases
OnKey
No in-app purchases
Questions
Is Jazz Scales Trainer free?
Is OnKey free?
Which has better reviews, Jazz Scales Trainer or OnKey?
Do Jazz Scales Trainer or OnKey have ads?
Which is updated more often, Jazz Scales Trainer or OnKey?
Other comparisons
