About
DuoBolt is a desktop app for macOS and Windows that finds what you have twice and lets you decide what to keep.
Duplicate files, proven byte for byte with a full BLAKE3 hash. Names, dates and folders play no part in it.
Similar photos: bursts, edits and re-exports grouped by what they look like, including your Photos library on Mac. On-device AI ranks each group and names every measure it used.
Sync Folders, new in 2.3: compare two folders by contents, mirror either way or sync both ways. A file changed on both sides waits for you.
Nothing is removed until you review it, and the history restores what was removed from a surviving copy. Everything runs on your machine: nothing is uploaded, and no account is required.
DuoBolt is free to use. The paid plans are a one-time purchase, with no subscription.