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Number System Trainer

Number System Trainer

Nashville Number System

12 ratings
8 reviews
📚 Education
🎵 Music
Free
In-App Purchases

Details

Released
July 7, 2026
Updated
November 5, 2026

Features

Developer

Brandon Oaks
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Number System Trainer screenshot #1 for iPhone
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iphone
ipad
🧾$2.99
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About

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.

✓Interactive learning modules
✓Chord reading and identification
✓Instant transposition
✓Ear training exercises
✓Visual chord shapes
✓Circle of 4ths & 5ths reference
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What's New in Number System Trainer

2.0

November 5, 2026

Version 2.0 helps you experience the Nashville Number System before deciding whether to unlock the full app. • A new six-step guided lesson built around a real progression • Hands-on free previews for Play Along, Transpose, and the Circle of 5ths • Four levels of chart reading and ear training • A new two-minute Play Along drill with four selectable tempos • Piano and guitar views with capo guidance in every key • Faster one-screen onboarding • Clearer, module-specific unlock screens shown after completed activities • Purchase and restore reliability improvements

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Subscriptions & In-App Purchases

$2.99

Full Unlock

Unlock every module, level, and key.

User reviews

Most RecentHighest RatedLowest Rated

Life Changing

I was a hot mess before this app. But after installing the Number System Trainer, I'm still a mess. Except now I can navigate my life problems with a sharpened toolset of musical abilities. None of which directly alleviate the before-mentioned mess. But alas, this app helps you improve your musical prowess. And that boosts self confidence. And self confidence will lead to better life habits. And better habits lead to a fulfilling life. So, one may not simply study the Nashville Number System, rather it studies you. Thank you.
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DDarkChocAlmondsFTW

Great app! Very helpful!

If you or someone on your team needs help learning and understanding the number system, get this app and play with it. Full of information that will help you make sense of the numbers. Great for worship leaders, band members, young and old.
Rronmyers

Must Have

This app is crazy creative! A must have for every worship leader!
L2Lori Oliver 2819

Its so tuff

Its so tuff
SSgraggletron5000

every worship leader needs this!

No other app like this out there!! Super convenient and easy way to learn the Nashville Number System. every worship leader should have this app!
SSwfliPhone
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FAQ

What is the Nashville Number System?

The Nashville Number System is a method used by musicians to learn songs quickly, transpose on the fly, and communicate chord progressions. It uses numbers to represent chords in relation to the key, making it universally understandable.

Who is Number System Trainer for?

Number System Trainer is designed for musicians of all levels, from beginners who know a few chords to experienced worship leaders and session players. It helps anyone looking to master the Nashville Number System.

Does Number System Trainer have ads?

No, Number System Trainer does not contain advertisements. It offers a clean, ad-free learning experience for users.

How often is Number System Trainer updated?

The app was last updated on July 21, 2026, with version 1.1.1. This indicates recent development and potential for future updates based on user feedback and new features.

What devices support Number System Trainer?

Number System Trainer is available for iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users.

Is Number System Trainer suitable for young learners?

Yes, Number System Trainer has an age rating of 4+, making it appropriate for younger users interested in learning music fundamentals.

Can I use Number System Trainer offline?

The app description states 'Works instantly' and 'No login required,' suggesting that core functionalities are available offline, allowing for practice anytime, anywhere.

What are the interactive modules in Number System Trainer?

The app features six interactive modules: Learn, Read Charts, Transpose, Ear Training, Play Along, and Circle of 4ths & 5ths, covering various aspects of the Nashville Number System.