Copy before you move: how Obscura Trace protects your originals
A temporary name, a copy read back from disk, a journal written before each step, a source removed only if it has not changed: what happens during a transfer.
Blog
The choices behind the app.
Why the app copies before it moves, what the confidence it shows means, what has been measured and what has not yet. Every claim points back to the user guide.
Exact duplicate, probable duplicate: what the displayed confidence means
Why Obscura Trace separates a verified fact from an estimate, how it decides that one image looks like another, and why it would rather miss a duplicate than invent one.
One million real photos: what we measured for 0.2.0
A full analysis of 10⁶ JPEGs, a release suite with no silent loss, and the numbers that do not meet their target yet. Published measurements, limits included.
Next step
Find out what your drives really hold.
Obscura Trace is signed with Developer ID and notarized by Apple. macOS 14 Sonoma or later.