Horucco
A collaborative music theory and songwriting app
Horucco launched on January 3, 2022 with 83 votes, #536 of 2,891 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 4 years on.
What it does
Horucco is an cloud based app for musicians, songwriters, producers of every skill level Explore chords and discover related chords on the fly. Once you’ve found a nice chord sequence, drag and drop chords into your song to build your composition upon it.
A music composition app. A music mobile studio. A music theory app. Explore chords and discover related chords on the fly.
Horucco listens to songs and shows the chords in real time. Transpose and tweak them, drag & drop into a timeline, get theory explanations and next-chord suggestions, then build a demo fast with instruments, patterns, and export. You don’t need to be a theory expert. Horucco helps you make sense of chords, scales, modes, and progressions as you use them — with an AI teacher that explains what’s happening in your progression. DAWs are amazing for production, but they’re not built to explore harmony. Horucco helps you find interesting chord movement quickly: detect chords from songs, transpose, reharmonize, and try substitutions without breaking your flow. Capture ideas anywhere. Use the mic…from horucco.com
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