OpponentBook for Android is now on Google Play
OpponentBook is now on Google Play. If you compete on an Android phone, install it, sign in, and the journal you may already keep in the browser is on your phone — same book, same pages. If you are new, it starts empty, and the first entry takes about thirty seconds.
This is the short, plain account of what the Android app is, what it changes, and what it doesn’t.
What the Android app is
OpponentBook has run in the browser since launch, on phones included. The Android app is that same application in a native shell — one codebase, one set of screens, the same features on the same tiers. That is worth saying plainly because it settles most questions in advance: there is nothing to migrate, no second account, and nothing you can do in one that you cannot do in the other.
What changes is how the journal sits on a phone. An icon on the home screen instead of a tab among tabs. Opening straight to Today, with the next competition and the names you should reread before it. Small things — but the phone is where most entries actually get written, at the venue, between bouts, in the car afterwards, and small friction there is the difference between a note and no note.
Offline first, by design
Sports halls are where mobile signal goes to die. The app keeps a working copy of your whole journal on the device, so every screen opens and every note saves with no connection at all. When the phone is back online, the changes sync — through your own storage, never through our servers.
Your storage, on Android
On Android the app connects to Google Drive or Dropbox. iCloud is not available to Android apps, so it stays an option in the browser only. The privacy architecture is exactly the one described in why your notes are tactical secrets: what you write is stored on your own drive, and we structurally cannot read it — it is not on our servers to be read. Turn on the optional end-to-end encryption and your notes are sealed on the device before upload, so your storage provider cannot read them either. The switch is in Settings on Android as on the web, and the same password unlocks the same journal on every device.
If you already use OpponentBook in the browser, the phone needs one thing from you: connect the same Google Drive or Dropbox account, and the journal comes down. A large journal with many photos and clips can take a few minutes on that first sync; after that, only changes travel.
Free, and the paid tiers
The whole journal is free on Android, exactly as on the web — unlimited opponents, matches, training entries, photos and video, pins on your sport’s schematic, sync, offline mode, PDF and Word export. Premium, Pro and Max — the AI summaries, briefs, match reviews and analytics — are sold through Google Play billing inside the app, monthly, at prices Google Play sets per region and shows before you confirm. A subscription belongs to your account, not to the device: subscribe on Android and the same tier is active in the browser, and the other way round. Annual plans remain web-only, because the stores carry monthly plans only. The full comparison is on the pricing page.
What about iPhone?
Not yet. An iOS app is in the works; until it ships, the web app works in Safari on iPhone and iPad, with the same journal and the same storage options, iCloud included. This blog will say so when it changes.
Requirements, and the first five minutes
The app runs on Android 7.0 or later. Then:
- Install from Google Play and sign in — with Google, or with email and password. Sign in with Apple is not offered on Android; if you signed up with Apple elsewhere, set a password under Settings → Account on that device first.
- Connect Google Drive or Dropbox under Settings → Storage — or skip it, keep the journal on the device only, and connect later.
- Pick your sport, open Opponents, and add the last person you faced. Name, club, one observation.
That third step is the whole habit. Why every athlete should keep an opponent journal is the long version; the short one is that what you noticed today is mostly gone within days unless it gets written down — tonight, on the phone already in your pocket.
If something in the app is wrong on your device, write to support@opponentbook.com and say which phone and Android version you are on. A person reads it.
