DuoBolt

DuoBolt is a high-performance desktop application for reclaiming disk space, with two engines.

The first uses a multi-threaded BLAKE3 scan engine to perform exact, byte-for-byte comparisons across folders, codebases, design archives, external drives, and NAS volumes — without relying on filenames, metadata, or heuristics.

The second finds similar photos: bursts, edits, re-saves, and screenshots of the same shot. It groups them across five bands of tightness, keeping variants and look-alikes apart, and AI Curation ranks each group and names the measures behind every pick — face sharpness, exposure, eyes open, smile, resolution. All analysis runs on the local machine. Nothing is uploaded, no account is required, and no connection is used.

The workflow is review-first and predictable: • Select locations to scan • Review results in two columns — groups on one side, their files on the other — with filtering by name, file type, extension, tag and size range • Act safely: move to the system Trash or Recycle Bin, delete, archive to a folder of your choice, copy elsewhere, or on a Mac replace a copy with an APFS clone • Track every operation in a persistent history and restore files when needed

Sync Folders compares two folders by their contents and brings them in line, mirroring either way or both ways. Both ways keeps a record of the last sync, so it knows which side changed, and a file changed on both sides waits for a decision instead of being overwritten by the newer date.

On macOS, DuoBolt detects APFS clones — files that share storage on disk — and reports them as 0 B recoverable, so the space it promises is the space the disk actually frees. Replace with clone goes the other way: it turns a marked duplicate into a clone of the copy kept, so both files stay and the disk stores them once.

Designed for professional environments where correctness, transparency, and reversibility are essential.

Every download starts with a 7-day Pro trial. After it ends, DuoBolt keeps working: scans, comparisons and results stay complete and unlimited, and a single operation — a removal, a clone run or a sync — is capped at 25 files or 500 MiB. A one-time license removes the cap — Standard for duplicates and syncing, Pro for similar photos and AI Curation. There is no subscription.