Chord Degree vs JazzTree

Knowing harmony doesn’t mean you can react fast enough. On stage, while improvising, transcribing, composing, arranging, or taking an exam, there’s no time to stop and work it out. Chord Degree isn’t a music theory reference. It’s a high-speed chord and scale-degree reflex trainer for every musician. Whatever your instrument or experience level, from beginners to working professionals and seasoned players, focused two-way training turns chord-to-degree and degree-to-chord recognition into an automatic response. Train with standard practice, timed challenges, ii-V-I drills, and essential chord progressions. The unique match-3 game mode makes repetition more engaging, less tedious, and easier to stick with. Built-in statistics combine practice volume, accuracy, and response speed to show your proficiency in every key. Mistakes and weak areas are tracked automatically, so every session has a clear purpose. It doesn’t train how much you know. It trains how fast you can use it when it matters. No account required. No ads. Try it free, then unlock unlimited training with a subscription or one-time purchase. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

JazzTree is a visual listening guide to jazz history. Explore 39 genres, see how they descend from, react against, and revive one another, and find about 350 records selected to make those relationships audible. EXPLORE THE LINEAGE Follow jazz across time in three complementary views: a focused rail, historical spans, and a full influence map. Filter connections by harmony, rhythm, form, instrumentation, improvisation, timbre, repertoire, social context, and technology. BROWSE 39 GENRES Search and sort genre profiles with concise histories, musical traits, key figures, contested boundaries, and gateway, core, and deep-listening albums. FOLLOW CURATED PATHS Take three ordered listening routes. Each step explains why one record follows another, and your progress stays on your device. LISTEN IN YOUR SERVICE Open albums in Spotify, Apple Music, or NetEase Cloud Music. JazzTree does not require an account. BUILT FOR CAREFUL EXPLORATION • About 350 albums • English and Simplified Chinese • Light and dark appearances • Offline editorial content • Confidence notes for uncertain discographic details • No ads and no JazzTree account Genre boundaries are arguments, not facts. JazzTree shows where scholars disagree and makes its editorial uncertainty visible.