# OnKey Lite vs Instrument Scale Master

The clearest difference is rating: Instrument Scale Master at 5.0 against OnKey Lite's 4.5. OnKey Lite's advantage is update cadence (every 3 months vs every 9 months) and iOS requirement (14.0 vs 16.0). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Instrument Scale Master holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

OnKey Lite ships an update every 3 months, Instrument Scale Master every 9 months. The most recent releases landed on June 10, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | OnKey Lite | Instrument Scale Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/onkey-lite-scale-practice/id1638630839/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/instrument-scale-master/id1661819423/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 9 months |
| Monetization | Free | Free |
| Size | 1 MB | 38 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rea Meir](https://appshunter.io/developer/1638204694) | [Carter Hawkins](https://appshunter.io/developer/1786186535) |

## What reviewers say

### OnKey Lite

[App page](https://appshunter.io/ios/app/onkey-lite-scale-practice/id1638630839)

This app generates readable, note-based exercises for practicing musical scales and chords. It's ideal for warm-ups, technique drills, or theory work, catering to musicians of all levels. Customize your practice with various patterns, keys, and note name options.

**Highlights:** Generate note-based exercises, Practice scales and chords, Transpose to any key, Set range and clef, Choose from various patterns, Add note names and time signatures

**Features:** macOS Compatibility

**In-app purchases:** none


### Instrument Scale Master

[App page](https://appshunter.io/ios/app/instrument-scale-master/id1661819423)

Master your instrument's scales with interactive learning and practice modes. View fingerings, notes, and get help with specific notes. Ideal for preparing for band auditions.

**Highlights:** Learn Mode for sectioned scale practice, Play Mode for testing scale knowledge, Scale Viewer with fingerings and notes, Note Lookup for specific note assistance, Supports Tuba, Baritone, Trombone, Bass Trombone

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OnKey Lite free?

OnKey Lite is free to download, with no in-app purchases.

### Is Instrument Scale Master free?

Instrument Scale Master is free to download, with no in-app purchases.

### Which has better reviews, OnKey Lite or Instrument Scale Master?

Instrument Scale Master is rated higher. OnKey Lite averages 4.5 out of 5 from 2 ratings, while Instrument Scale Master averages 5.0 from 4 ratings.

### Do OnKey Lite or Instrument Scale Master have ads?

Neither OnKey Lite nor Instrument Scale Master shows ads.

### Which is updated more often, OnKey Lite or Instrument Scale Master?

OnKey Lite ships an update every 3 months, and Instrument Scale Master every 9 months. Most recently, OnKey Lite was updated on June 10, 2026 and Instrument Scale Master on June 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*