Built for judo. Free for everyone.
Judo Timer JQ
Created to support the judo community — athletes, coaches, referees, parents and clubs. Just a complete judo tool, available to everyone.
Because access to better tools should never depend on the size of your dojo or your budget.
No subscriptions. No ads. No locked features.
On the mat
A complete judo tool
Shiai for the contest board, Randori for practice, and a Library kept on your device — every feature unlocked.
Why Judo Timer JQ
Modes that match the dojo
Competition scoreboard, interval practice, and reference tools — on iPhone and iPad. Nothing locked behind a paywall.
Shiai
Match clock, scoreboard, golden score and hansoku-make — decided by the rules, not by you. Osaekomi keeps its own clock; hold results are provisional until you confirm. Turn sideways for a full-width board the whole mat can read.
Randori
Interval rounds for practice: set work, rest and rounds once. The app calls each round, so you can stay on the mat with your eyes on the judoka.
Library
Every referee gesture next to the action it maps to in the app. Contest rules read from the live preset, a glossary of judo terms, kyu and dan grades, and finished contests kept on the device.
Undo any call
Undo reverses compound results exactly — waza-ari-awasete-ippon, hansoku-make, an applied hold — and no clock ever restarts on its own.
iPhone & iPad
Portrait and landscape, with an orientation lock for when the board has to stay put. Sound and haptics on every call, so you can keep your eyes up.
Private by design
No account, no analytics, no advertising, no purchases. No network requests of any kind. Match state, history and settings never leave the device.
Privacy first
What stays on your device
Judo Timer JQ makes no network requests of its own. Your contests never leave the phone.
- Active match state and recovery after backgrounding
- Finished contest history and local settings
- Rules preset, gestures, and reference content bundled in the app
- No account, no cloud sync, no ads, no tracking
Available in English, French, Spanish and Russian, switchable inside the app. Need help? Visit the Help Center or email hello@teraflow.app.
Our contribution to the judo community
Free by choice
Judo Timer JQ is free by choice. We built it as a social project for the international judo community. Our goal is simple: give every athlete, coach, referee and dojo access to professional judo tools — regardless of country, club size or budget.
For every dojo.
For every judoka.
Free.
No Ads · No Subscription · No Account
Download
Get Judo Timer JQ
A complete judo tool. Available to everyone.