What is OpponentBook?
A private opponent book and training journal. Record opponents, matches, training and events, with notes and annotations you can revisit. The journal is free; paid plans add analytics, training plans and optional AI tools.
Getting started
Your first opponent, match and storage connection
What should I record first?
Choose your sport, open Opponents and select + Add. Start with the name of someone you faced recently or expect to meet soon, then add one useful observation. Club and other details can wait if you do not know them. Add a match result and what you want to try next.
Do I need to connect cloud storage?
No. You can keep local records on this device. Connecting your own Google Drive, Dropbox or iCloud enables cloud storage and sync with other devices. Without that connection, there is no cloud backup; save a backup file if you want a separate copy.
Find help with your journal, privacy settings and subscription. If you don't find what you need, email support@opponentbook.com.
Ready to try it?
The whole journal is free, forever, on your own storage.
Sign up free