# Instrument Scale Master vs Trombone Slide Position Chart

The clearest difference is in-app purchases: Instrument Scale Master at none against Trombone Slide Position Chart's 1. Instrument Scale Master also leads on ads (none vs shown) and rating (5.0 vs 4.6). Trombone Slide Position Chart's advantage is update cadence (every 2 weeks vs every 9 months) and ratings volume (64 vs 4). On price, review sentiment and device support there is nothing between them.

Both are free to download. Trombone Slide Position Chart sells 1 one-off in-app purchase. Instrument Scale Master asks for nothing beyond the download.

Instrument Scale Master holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Trombone Slide Position Chart has 64 ratings behind it against 4, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Instrument Scale Master ships an update every 9 months, Trombone Slide Position Chart every 2 weeks. The most recent releases landed on June 11, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Instrument Scale Master | Trombone Slide Position Chart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/instrument-scale-master/id1661819423/reviews)** | [4.6 (64 ratings)](https://appshunter.io/ios/app/trombone-slide-position-chart/id6472855302/reviews) |
| Number of ratings | 4 | **64** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 38 MB | 17 MB |
| Requires iOS | 16.0 | **12.4** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carter Hawkins](https://appshunter.io/developer/1786186535) | [Andriy Holovchak](https://appshunter.io/developer/1650845198) |

## What reviewers say

### 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


### Trombone Slide Position Chart

[App page](https://appshunter.io/ios/app/trombone-slide-position-chart/id6472855302)

Master trombone slide positions with this interactive guide. Features include a metronome, tuner, quiz, and virtual instrument to help musicians of all levels improve their playing.

**Highlights:** Interactive slide position chart, Metronome, Tuner, Slide position quiz, Note frequency information, Virtual trombone

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $12.99 | one-time |


## Frequently asked questions

### Is Instrument Scale Master free?

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

### Is Trombone Slide Position Chart free?

Trombone Slide Position Chart is free to download, with in-app purchases available.

### Which has better reviews, Instrument Scale Master or Trombone Slide Position Chart?

Instrument Scale Master is rated higher. Instrument Scale Master averages 5.0 out of 5 from 4 ratings, while Trombone Slide Position Chart averages 4.6 from 64 ratings.

### Do Instrument Scale Master or Trombone Slide Position Chart have ads?

Trombone Slide Position Chart shows ads; Instrument Scale Master does not.

### Which is updated more often, Instrument Scale Master or Trombone Slide Position Chart?

Instrument Scale Master ships an update every 9 months, and Trombone Slide Position Chart every 2 weeks. Most recently, Instrument Scale Master was updated on June 11, 2026 and Trombone Slide Position Chart on September 22, 2026.

---

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