Press kit

DuoBolt finds duplicate files and look-alike photos on macOS and Windows.

DuoBolt finds exact duplicate files with BLAKE3 hashing, groups look-alike photos with an engine that names every measure it used, and on a Mac reads the Photos library directly. Nothing is removed without a review screen. Free to use.

DuoBolt finds two things and keeps them separate, because they are not the same question. Exact duplicates are decided by content — files are partitioned by size, filtered by a head-and-tail prehash, and confirmed by a full BLAKE3 hash — so names, dates and folders play no part in it. Similar photos are a judgment, so DuoBolt shows its reasoning: images are grouped by perceptual hash, labeled as Variants or Look-alikes, and ranked by AI Curation, which names every measure it used — sharpness, exposure, resolution, and where faces are found, eyes open and smile. On a Mac, the Photos library is a source in its own right: DuoBolt reads it without exporting, shows Photos' own names, tells the copies of a photo imported more than once apart by their import, and removes to Photos' Recently Deleted. Every model ships inside the app and runs on the device: nothing is uploaded, no account is required, and it works with no network connection. Nothing is removed by scanning; marked files pass a review screen that warns where a file would be left with no surviving copy, and Operations History can restore what was removed. DuoBolt is free to use, with complete scans and complete results — the paid tiers lift the limits on how much a single operation moves and how many photo groups a scan shows.