What Hydian reads, sends and keeps.

The app

What it reads on your computer

• The combat log files the game writes, to find your character, the area you are in and your position.
• The game settings folder, for the names of your characters.

That is all. Hydian does not read the game process, its memory or any other file.

What it sends

Every character starts Invisible. Nothing about a character leaves your computer until you set it to In character or Out of character. For a shared character the app sends:

• Character name, character id, class and discipline, game server.
• Area, instance, position and heading, and the moment the log recorded them.
• Your status (In character, Out of character), whether you are looking for roleplay, and health.
• The log line the event came from, so a bad reading can be traced.
• The random install id and the app version.

The app also sends sightings: names, ids and positions of players your combat log mentioned near a shared character. They are kept for statistics and shown to nobody; the "Not on Hydian" pins on your own map come from your own log, on your computer.

With Upload log history switched on in Settings › Privacy, the app sends the same fields from older combat logs on this device for the characters you share. History only feeds the heatmap; it never shows anyone as present.

Friend connections (which characters you follow) and the optional feedback form are sent with the install id.

What others see

A shared character appears on the map and in the registry with name, area, position, status and looking-for-roleplay flag, and stays present for 45 minutes after the last event. Nobody sees your class, your health, your install id, your log lines, your friends or your notes.

What stays on your computer

• Invisible characters, in full.
• Your journal, notes on people, and friends list.
• Settings, hotkeys and the overlay layout.

Where it is stored and for how long

The Hydian server runs on Railway in the European Union (europe-west4). Live presence expires after 45 minutes. Positions are kept so the heatmap and the activity statistics have history.

Railway keeps ordinary request logs for its own operation, which include IP addresses. Hydian stores no IP addresses of its own.

Deleting

Settings › Privacy › Delete what this device sent removes your characters from the registry and the live map, deletes your friend connections and the install id, and replaces the name and log lines on every position this device sent with anonymous placeholders. Positions remain in the heatmap without a name.

Setting a character back to Invisible removes it from the map and the registry right away.

The website

• No cookies, no analytics, no tracking.
• Your Republic or Empire choice is kept in your browser's local storage and never sent anywhere.
• The download page loads the version number and the installers from dl.hydian.org, which Cloudflare serves.
• The site is served by Cloudflare, which keeps its own request logs.

Questions

[email protected]

Last updated 18 September 2026.