Dueling Dimension — Privacy Policy
Last updated: 13 November 2026
Dueling Dimension ("the app") is made by CrownCorp, Belgium. This policy explains what happens to your data when you use the app.
Short version: the app does not collect personal data. There are no accounts, no analytics and no ads.
What stays on your headset
The app saves a few things on your headset so it works the way you left it:
- your settings (for example play position, activation confirmation, volume);
- which duel effects you've already seen, so repeats can play shorter;
- card data and images it downloaded, so it doesn't download them again.
This data never leaves your headset. Uninstalling the app deletes it.
Hand tracking and your room
The app uses hand tracking so you can pick up and play cards. Hand and head positions are provided by Meta Horizon OS while the app runs; the app uses them in the moment and does not store or send them. The passthrough view of your room is shown by the headset itself; the app cannot see, record or send camera images.
What the app downloads
To show cards and monsters, the app may download files from:
- Our content server (hosted on Railway, files stored on Cloudflare R2): card data and 3D models.
- YGOPRODeck (db.ygoprodeck.com, images.ygoprodeck.com), in some versions of the app: card information and card artwork.
Like any download on the internet, these servers receive your IP address and basic request information (such as the file requested and the time). We don't use this to identify you, and we don't combine it with anything else. Our hosting providers may keep standard server logs for a short time for security and operations. YGOPRODeck is a third party with its own privacy policy: ygoprodeck.com/privacy-policy.
Meta
The app runs on Meta Horizon OS and is distributed through the Meta Horizon Store. When the app starts, it asks Meta whether your account owns the app (an "entitlement check"). That check is handled by Meta; the app only receives yes or no. Meta's own processing is covered by the Meta Privacy Policy.
Children
The app is not directed at children under 13 and does not knowingly collect data from anyone.
Your rights
Because we don't collect personal data, there is normally nothing for us to look up, correct or delete. If you are in the EU/EEA or UK you still have the right to ask us about it, and to complain to your data protection authority (in Belgium: the Gegevensbeschermingsautoriteit / Autorité de protection des données).
Changes
If the app starts collecting data (for example online play or crash reports), we'll update this policy before that version is released and change the date at the top.