# G·Chord vs Number System Trainer

The clearest difference is device support: Number System Trainer at 3 against G·Chord's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 23, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | G·Chord | Number System Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (10 ratings)](https://appshunter.io/ios/app/number-system-trainer/id6786437503/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 37 MB | 10 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Robin Casaljay](https://appshunter.io/developer/6772189047) | [Brandon Oaks](https://appshunter.io/developer/6786437505) |

## What reviewers say

### G·Chord

[App page](https://appshunter.io/ios/app/gchord/id6772189045)

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

**In-app purchases:** none


### Number System Trainer

[App page](https://appshunter.io/ios/app/number-system-trainer/id6786437503)

Learn and master the Nashville Number System for music. This app offers interactive modules to help musicians of all levels understand chord progressions, transpose songs, and improve their ear training. It's designed for quick learning and on-the-fly musical communication.

**Highlights:** Interactive learning modules, Chord reading and identification, Instant transposition, Ear training exercises, Visual chord shapes, Circle of 4ths & 5ths reference

**Features:** macOS Compatibility, Family Sharing

**In-app purchases:** none


## Frequently asked questions

### Is G·Chord free?

G·Chord is free to download, with no in-app purchases.

### Is Number System Trainer free?

Number System Trainer is free to download, with no in-app purchases.

### Do G·Chord or Number System Trainer have ads?

Neither G·Chord nor Number System Trainer shows ads.

### Which is updated more often, G·Chord or Number System Trainer?

G·Chord ships an update weekly, and Number System Trainer weekly. Most recently, G·Chord was updated on September 23, 2026 and Number System Trainer on October 2, 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.*