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OnKey turns your Mac into a real-time karaoke coach
What is OnKey – I'm a bad singer, so I built an app to show where I'm off-key?
OnKey is a free, open-source Mac app that watches you sing along to any song playing in Spotify, Apple Music or YouTube and shows where you’re off-key. After a first pass it learns the melody, then scrolls the notes and scores your pitch live as you sing.
Who it is for
Home singers or vocal learners can install it to get instant, privacy-preserving feedback without paying for a lesson.
How to try it
Download the latest OnKey.dmg from the GitHub releases page and drag it to Applications.