Jhanu Umpires — ITF umpire training with real videos

Video-based practice

Score real videos, get measured against the experts

Every learner attempt is compared click-by-click against the expert reference recorded by a judge in sync with the video.

🎥

Session library for both disciplines

Patterns (Tuls) with deduction-based scoring tied to the official Tul catalog by belt rank, and Sparring with point-based scoring (+1 / +2 / +3) for the RED and BLUE corners.

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Realistic exam conditions

Once the video starts, it cannot be paused or rewound — just like a real bout. Full-screen clicker optimized for mobile, with undo, deductions and screen-always-on.

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Objective, automatic evaluation

Instant report with precision score, coherence score, chosen winner vs. reference winner, and pass/fail outcome.

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Timestamped judge comments

Comments appear in the report anchored to the exact moment in the video — learners jump straight to each teaching point.

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Training plans

Group sessions into published training paths (curricula) with sequenced items and per-learner attempt tracking.

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Full progress history

A complete evaluation history per learner to track improvement over time, session after session.

Live interactive classes

A whole room scoring at once

A judge presents a session to the entire room and every participant scores in real time — ideal for seminars, clinics and judge calibration events.

Participants join in seconds by scanning a QR code or entering a join code — guests don't need an account.
The presenter controls playback (play, pause, stop), enables or disables clickers, and resets counters for the whole class.
Real-time aggregated results: live per-participant counters, RED/BLUE winner banner and vote breakdown on every screen.
Designed and load-tested for 100+ simultaneous clickers per class.

Jhanu Umpires

RED

12

+1+2+3

BLUE

9

+1+2+3

🔴Live class48 participants connected

📊Winner: REDVote breakdown 31 – 17

Learners, judges and administrators

One platform, a role for everyone

From the trainee's first practice session to the organization's audit trail, every role has its own tools.

Learners: practice sessions, guided training plans, instant evaluation reports and full progress history.
Judges: authoring tools to build session libraries, define the expert reference scoring and run live classes.
Administrators: user and role management, attendance and activity reports, live-session analytics with CSV export, and a full audit trail.
Passwordless sign-in: users receive a one-time code by email — no passwords to manage or forget.
Live-session reports with a 70% approval threshold badge, attendance by date and monthly connection activity — all exportable to CSV.

Evaluation report

Precision

92%

Coherence

88%

Outcome

Pass

💬01:24Missed a −0.2 deduction on the turnTul

💬02:47Correct +2 for the jumping kickSparring

🏁Winner chosenMatches the reference winner✓

Technology you can trust

Built to run seminars, not demos

Part of the Jhanu ecosystem, with centralized identity across products.

📱

One codebase

Cross-platform client

Flutter — one codebase for Android, iOS and web, embedded and served by the backend for one-artifact deployment.

⚡

Real time

Sub-second broadcasts

WebSocket/STOMP pipeline with sub-second aggregated broadcasts to every screen in the class.

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Secure video

Fast streaming worldwide

AWS S3 storage with signed CloudFront distribution — secure, fast video delivery anywhere.

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Operations

Secure and monitored

Java 21 / Spring Boot, PostgreSQL, JWT security, documented REST API (OpenAPI/Swagger), CloudWatch monitoring, automated backups and TLS.

The Jhanu ecosystem

Umpire training, connected to everything else

🌐Jhanu WebManage your academy end to end 🏆Jhanu TournamentsRun championships offline at the venue 🛟Request supportWe answer in Spanish and English

Train ITF umpires, objectively.