Welcome to a professional and 100% free music trainer – an interactive tool designed for intensive music theory practice. The app is available instantly, no login and no registration required.
Our platform offers effective exercises for musicians in four key areas:
- NNS Study (Nashville Number System): Master the industry standard for professional recording studios. This is an essential transposition exercise.
- Scale Degree Training: Learn the foundations of harmony, vital for ear training and chord construction.
- Learn Reharmonization: Understanding the relationships between degrees is the first step toward creating your own chord progressions.
- Jianpu (Numbered Notation): Practice the numerical notation system used by millions of vocalists and musicians worldwide.
The tool is fully responsive. You can perform your music workout anywhere: on your smartphone (Android, iOS/iPhone), tablet, or computer.
You can also install NNS Trainer as an app on your smartphone or tablet (launch it with a single click on the icon). On most Android browsers, tap the three dots and select "Install app". On iPhone, open the page in Safari, tap the share icon, and select "Add to Home Screen".