Matchfy doesn’t hack playlists or add tracks without permission. What you’re seeing is the Auto-AI feature, enabled by default, which automatically adds songs from other users when they match your playlist criteria.
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To stop automatic additions:
Go to Profile (top right) → Playlists → uncheck “Enabled” or adjust the match threshold. This lets you manually approve tracks like a curator. -
To hide your playlists from Matchfy:
In the same menu, disable “Enabled” to prevent your playlists from being publicly visible.
With these settings, you stay in full control of what appears in and who can see your playlists.