Account and Data Deletion
Last updated: September 19, 2026
This page explains how to delete the data saved by Reversi: 80 Days Patent War, and what is deleted.
How to delete
- Open the App.
- Open "Settings" from the home screen.
- Under "About", tap "Delete all saved data".
- Tap once more to confirm, and the deletion is carried out.
Deletion cannot be undone. Match records, move lists, skill estimates, and achievements cannot be recovered, so save any move lists you need before deleting.
What is deleted
The App stores game data on your device (in the browser's localStorage). The deletion action removes every item the App has stored.
- Match records and move lists
- Results, disc counts, and move records of your games
- Skill estimate
- Your estimated rating and the game history it is based on
- Achievements
- Unlocked achievements and progress
- Settings
- Theme, board texture, sound effects, haptics, and other settings
- Profile
- Your display name and avatar selection
- AI reviews and "The AI's thoughts"
- Saved AI reviews and the lines from "The AI's thoughts" shown during games
- Crash records
- Records of crashes kept on your device (for what is sent to the server, see Section 10 of the Privacy Policy)
- Authentication session
- Session information for your anonymous account
Your anonymous account is linked to you only through the session stored on this device. Deleting the session removes your means of claiming the account, so the deletion action also amounts to abandoning the account.
About data stored on the server
If you have taken part in online matches, your match records, rating, and leaderboard position are stored on our server. Even if you have not played online, purchasing or restoring Premium or a cosmetic item creates an anonymous account, and its identifier, display name (a provisional display name assigned automatically if you have not set one), and what you have bought are stored on the server. In addition, if you have used the AI features, an identifier used for rate-limit counting is recorded on the server (see Section 4 of the Privacy Policy for details).
If you have done none of these, the only thing stored on the server is a record of any problem the App ran into (Section 10 of the Privacy Policy). That record is not linked to you, so it cannot be the subject of a deletion request; turning off "Send problem reports" in Settings stops any further reports. Records, results, and settings for games against the AI are all kept on your device and are completely removed by the action described above.
The player information about you stored on the server (your identifier, your display name, and the avatar you chose), the records of reports, and your online results are deleted by the steps above, on versions of the App in which that action also deletes server-side data. If you are using a version that does not, contact us at the address below and we will delete the same data. On either route, three things remain. (1) The records of your online matches: they are converted into a form that cannot identify you (your identifier is removed) so that they stay consistent with your opponents' records, and the game result remains for your opponent. (2) Your purchases (your entitlements to Premium and to cosmetic items), so that "Restore purchases" in each store can give them back without paying again. (3) The anonymous account itself: deleting it would take your purchases with it, so it is kept — but the session on your device is deleted by the same action, so there is no way back into it. Identifiers recorded for rate limiting are deleted automatically once they are more than 2 hours old, in the course of subsequent calls.
- Send deletion requests to
- contact@aicreonext.com
- Operator
- AICREO NEXT LLC (合同会社AICREO NEXT)
If you uninstall the App
Uninstalling the App (or deleting this site's data from your browser) also removes the data stored on your device. Depending on your browser settings, however, some data may remain, so if you want to be certain it is gone, perform the in-app deletion before uninstalling.