What is stored, what is encrypted and how recovery works
On your device and, when connected, your Google Drive, Dropbox or iCloud storage. Journal records include notes, matches, training, events, saved AI results, review history and attachments. OpponentBook does not keep a server copy of that journal. We handle account, subscription and usage information, plus a minimal index and settings needed for the service.
Using your own storage determines where the journal is kept. Your provider protects ordinary cloud files, but can still have access to their contents. Optional end-to-end encryption (E2EE) encrypts journal records on your device before upload, protecting their contents from the provider. Requested AI processing is separate and is described below. E2EE does not cover photos or video, file metadata visible to the provider, or access through an unlocked device.
Use the recovery code shown when you enabled E2EE. Keep that code safe; it is shown only once. If you lose both the encryption password and recovery code, neither OpponentBook nor your storage provider can restore the encrypted records. An account-password reset does not reset E2EE.
Records stay in this device's browser or app storage. You can write notes and read locally available records offline, but nothing syncs to another device or the cloud. Connect a provider in Settings → Storage when ready; the first sync uploads your local records. Google Drive and Dropbox work in the iOS and Android apps and on the web; iCloud is available in the iOS app, and on the web unless Advanced Data Protection is turned on for your Apple Account.
Not currently. E2EE protects structured journal records, including notes, matches, training, events, saved AI results and review history. Photos and video remain ordinary files protected by your storage provider's standard security. If you need those attachments hidden from the provider, do not upload them with the current media system.
Find help with your journal, privacy settings and subscription. If you don't find what you need, email support@opponentbook.com.
The whole journal is free, forever, on your own storage.
Sign up free