Support
Last updated: 2026-08-02
Questions, bug reports and feature requests all go to one place: email. Changelo has no accounts and no support portal to sign in to.
Getting in touch
Write in any language; replies come in English or Russian, usually within a few working days. The address is at the bottom of this page.
There is nothing for us to look up on our side: Changelo runs entirely on your device and sends us nothing, so what you describe is all we know about the problem.
What helps us answer faster
The app version and build number, both shown in Settings; your macOS or iOS version; and the kinds of files you compared — the format matters far more than the contents.
What you expected Changelo to say, and what it said instead. For a wrong verdict, that difference is the whole bug report.
Sending a report
“Export Report” saves a .changelo file describing a single comparison: file names, sizes, hashes, and every change Changelo found, including values it read out of the documents.
It is plain JSON, so you can read it before attaching it. Please do not send the compared files themselves unless we ask and you are happy to share them.