Overmerge beta · last updated 12 November 2026
Overmerge is a flight-debriefing app made by ZAYC LTD, London, United Kingdom. It runs in your web browser at overmerge.app and as a desktop app for macOS, Windows and Linux. This page explains what happens to your data when you use it. The security page lists every network call and every file the app writes, with the code that does it.
When you open an ACMI recording, it is read and analysed on your own computer, inside your browser or the desktop app. Recordings are never uploaded to us or to anyone else. If you open a recording from a link, your browser downloads it from the site that hosts it.
These are kept in your browser's storage (or the desktop app's own), on your device only. Clearing this site's data in your browser removes them.
The desktop app also writes these files, only when you use the feature:
license.json in the app's data folder,
after you enter one. The key is checked on your computer; nothing is sent to us. It holds
a one-way fingerprint of the buyer's email address, not the address itself.
Saved Games folder and adds one line to
Export.lua (keeping a backup first). DCS then writes your missions as
recordings to Saved Games/DCS…/Tracks/Overmerge. Removing the setup takes
both out again.
Documents/Overmerge/Live, and the reports and exports you save.
The beta uses no analytics, no advertising, no crash reports and no cookies. We do not build profiles or sell data.
server.arcgisonline.com). Esri sees your IP address
and which area of the map you look at, under its own privacy terms. If you choose another
provider in Settings, it sees the same instead. The built-in world map is part of the
app and needs no network.
s3.amazonaws.com), which sees which area you asked for.
You can choose another source or a folder of tiles on your computer instead.
Questions or requests about your data: privacy@overmerge.app. If you are in the UK or EU, you can also complain to your data-protection authority (in the UK, the ICO).