--- title: "Number System Trainer - Reviews, Revenue and Downloads in United States | Apple App Store" description: "Number System Trainer teaches you the Nashville Number System — the method worship musicians and session players use to learn songs fast, transpose on the fly, and communicate with any musician in any" --- # Number System Trainer — United States > Nashville Number System ![Number System Trainer App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/01/80/c7/0180c71d-6a5b-2eca-4caa-7b908e9e7c48/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png) **Developer:** [Brandon Oaks](https://apptail.io/developer/brandon-oaks-Gexzwc) **Category:** Music **Rating:** 5.0/5 (12 ratings) **Price:** Free **Bundle ID:** com.brandonoaks.nnstrainer **Store:** Apple App Store **Country:** United States **Version:** 1.1.1 (released 2026-07-21) **Original Release:** 2026-07-07 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6786437503) **AppTail Page:** [https://apptail.io/app/number-system-trainer-ToXA/united-states](https://apptail.io/app/number-system-trainer-ToXA/united-states) ## Number System Trainer Description Number System Trainer teaches you the Nashville Number System — the method worship musicians and session players use to learn songs fast, transpose on the fly, and communicate with any musician in any key. Whether you're a beginner who only knows 3 chords or an experienced worship leader, this app meets you where you are. 6 INTERACTIVE MODULES • Learn — A 5-step intro to how the number system works • Read Charts — 4 levels from basic chords to slash chords • Transpose — Move full progressions to any key instantly • Ear Training — 3 levels, identify chords just by listening • Play Along — See piano and guitar shapes in every key, with capo tips built in • Circle of 4ths & 5ths — Tap any key to see all 7 chords No login required. Works instantly. ## Number System Trainer Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/91/8f/21/918f2178-0422-7089-5210-72c1af4446fd/Simulator_Screenshot_-_iPhone_17_Pro_-_2026-07-01_at_20.45.02.png/1242x2688.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/9b/8c/07/9b8c0769-fe0c-509d-db71-66863e8b5821/Simulator_Screenshot_-_iPhone_17_Pro_-_2026-07-01_at_20.44.44.png/1242x2688.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/e3/6c/1d/e36c1dc7-d986-12ab-c635-e4129565b432/Simulator_Screenshot_-_iPhone_17_Pro_-_2026-07-01_at_20.44.14.png/1242x2688.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/10/92/62/109262b0-ff30-c32c-219f-c02396f26ca6/Simulator_Screenshot_-_iPhone_17_Pro_-_2026-07-01_at_20.44.05.png/1242x2688.png) ## Number System Trainer Rating Breakdown in United States - 5 stars: 12 (100%) - 4 stars: 0 (0%) - 3 stars: 0 (0%) - 2 stars: 0 (0%) - 1 stars: 0 (0%) ## Number System Trainer Available In - [United States](https://apptail.io/app/number-system-trainer-ToXA/united-states) - [United Kingdom](https://apptail.io/app/number-system-trainer-ToXA/united-kingdom) - [Guyana](https://apptail.io/app/number-system-trainer-ToXA/guyana) - [Indonesia](https://apptail.io/app/number-system-trainer-ToXA/indonesia) - [India](https://apptail.io/app/number-system-trainer-ToXA/india) - [Netherlands](https://apptail.io/app/number-system-trainer-ToXA/netherlands) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends. - [Search Apps](https://apptail.io) - [Top Charts](https://apptail.io/top-iphone-apps) - [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer) *Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*