A small camera and microphone we're designing for club and backyard umpires. Worn on the chest, it's meant to give TV-style reviews of LBWs, edges and run-outs, and to count the balls for the scorer. It's a decision aid: the umpire always decides.
What ClubEye can and can't do today, in plain words. We'll update this page as we test.
The ClubEye device is being designed. It isn't on sale, and we haven't published any hardware prototype footage or test results yet. The decision software it will use is being built and tested first, in the CricketTech Android app (test versions only: in closed testing on Google Play, not public yet).
So far these have only been tried on sample and test videos. We haven't measured their accuracy on real matches yet.
We'll publish real results here, with the conditions, the number of deliveries and the error rates, once we have them. There are none to show yet. The accuracy figures further down this page are targets, not results.
Next milestone: field tests filming real deliveries on a phone, then a first device built from off-the-shelf parts. We'll share dates when we're confident in them.
The idea in ten seconds: the umpire clips it on, umpires as normal and presses Review when it matters. The phone then shows the ball's path and a suggested decision.
In club cricket, especially in South Africa and India, there are rarely enough qualified umpires. So the batting side's players take turns umpiring, and everyone knows how that ends.
You're padded up, next in to bat, and now you have to give your own teammate out LBW. Nobody wants that job.
No replays, no evidence, just two teams shouting. One bad call can spoil the whole afternoon.
TV review systems need a broadcast crew. Club and backyard cricket has never had anything it could afford. That's what we're building.
ClubEye is designed to clip to the umpire's shirt at chest height, where it sees straight down the pitch. The target weight is about 80 g, around half a cricket ball, so you shouldn't notice it after the first over.
What ClubEye is designed to do. None of it is on sale yet; see the development status for what works today.
Designed to find the ball in every frame and work out where it pitched, where it hit the pad and where it was going.
Two microphones listen for nicks, with a sound graph like the one on TV lined up with the video. Wind and noise make faint edges harder.
A second device at square leg would replay the crease frame by frame, for run-outs, stumpings and bat-grounded checks.
Designed to count balls and overs and suggest wides for the umpire to confirm. The scorer still enters the runs.
Share a live scorecard link on WhatsApp so players, parents and fans can follow ball by ball.
Every match, review clip and scorecard is saved to the cloud, with season stats for players and umpires.
After every match, each umpire would get a score showing how many of their reviewed decisions ClubEye agreed with.
No tripods, poles or wiring: charge it, clip it on and pair it with the app. Our goal is under 5 minutes.
No ball-tracking system is perfect, not even the one on TV. So, like the systems on TV, ClubEye works out its own margin of error. When the ball is too close to call, it says so, and the on-field decision stands.
Typical tracking error for a delivery tracked from the bowler's end
Of bat-on-ball contacts in normal match conditions
120 frames per second, so the gap between frames is 1/120 of a second
From tapping review to seeing the replay on your phone
Prototype targets. ClubEye is still in development and these are the accuracy targets we're building to, not final test results. We'll publish full, independent accuracy testing before launch.
Every LBW review ends with one of three clear answers.
Pitched in line or on off, hit in line, and clearly hitting the stumps even allowing for the margin of error.
Too close to call: the ball is only clipping the stumps, within the margin of error. The umpire's original decision stands.
Pitched outside leg, hit outside the line playing a shot, or clearly missing the stumps.
The plan: after every match, each umpire gets an Umpire Score showing how many of their reviewed decisions ClubEye agreed with. It's bragging rights in the clubhouse, and a great way for new umpires to learn.
Illustrative example: made-up numbers, not real match data
Two planned ways to use ClubEye.
For club and league games. Worn by the umpires, with full scoring. A live scoreboard is planned.
For the family, the street and the nets. Put it on the mini-stand behind the stumps and play.
Target specifications for the launch model. Subject to change as we finish development.
| Camera & audio | |
|---|---|
| Camera | 1080p at 120 frames per second, wide-angle lens |
| Microphones | Dual MEMS microphones, 48 kHz sampling for edge detection |
| Recording | Rolling buffer, so the last delivery is always saved, with no need to press record |
| AI & accuracy | |
| Processing | On-device AI chip (neural processor). Reviews work without internet (after a one-time sign-in in the app). |
| Tracking accuracy | ±2.5 cm at the stumps (target) |
| Edge detection | 95%+ of bat-ball contacts (target) |
| Review time | Under 10 seconds from tap to verdict (target) |
| Best position | Bowler's end, directly behind the stumps, 1–3 m back |
| Connectivity | |
| Wireless | Bluetooth 5.3 and Wi-Fi |
| Device-to-device range | Up to 30 m (bowler's end to square leg) |
| Cloud | Planned: syncs through your phone's data; works offline and syncs later |
| App | Free CricketTech app for Android (iPhone later) |
| Hardware | |
| Size | Approx. 75 × 40 × 22 mm |
| Weight | Approx. 80 g |
| Battery | 8+ hours of play (a full day). USB-C, 0–80% in about 45 minutes. |
| Durability | IP54 splash and dust resistant, built for dusty grounds and light drizzle |
| Mounts | Chest clip, cap clip, lanyard and mini-stand |
| Pricing | |
| Expected price | €99 per device, or €179 for an Umpire Pair |
| Subscription | None. The app and scoring are free, and the planned live scoreboard will be too. |
ClubEye device
Chest & cap clips
Mini-stand
USB-C cable
Register now with no payment. We'll email you when ClubEye is ready to order.
€99
LBW & edge reviews from one end. Perfect for the backyard.
€179
Both umpires, including run-out reviews. Save €19 on two devices.
Bulk
Kit out every team or every ground in your league
Indicative target prices in euros, not final. Local prices in rand (ZAR) and rupees (INR) will be confirmed before launch. Registering is free and doesn't commit you to buy.
The ClubEye column shows what it's designed to do, not tested results.
| Feature | Player-umpires | ClubEye | TV review systems |
|---|---|---|---|
| LBW ball tracking | — | Yes | Yes |
| Edge detection | — | Yes | Yes |
| Run-out reviews | — | Yes (2 devices) | Yes |
| Automatic scoring | — | Yes | — |
| Umpire Score | — | Yes | — |
| Setup | None | Goal: under 5 minutes | Cameras & TV crew |
| Cost | Free | €99 target | Out of reach |
No. ClubEye is designed as an aid. It would show the ball's path, any edge and run-out replays, but the on-field umpire always makes the final call. When it's too close, it shows "Umpire's Call" and the original decision stands. It doesn't replace an umpire or official review systems.
No. The plan is one device at the bowler's end for LBWs, edges and ball counting, and a second at square leg if you also want run-out and stumping reviews.
That's the plan, but we haven't tested it yet. Tennis and taped balls look and sound different from leather, so we'll test them separately and say what works.
It's designed to work without internet: reviews would run on the device and your phone, after a one-time sign-in in the app. The planned live scoreboard and cloud saving would use your phone's mobile data.
That's up to your league and both captains, so ask before using it in a match. We're happy to help you put a proposal to your league.
Not yet, and there's no launch date. Register your interest, with no payment and no commitment to buy, and we'll email you when there's news about launch dates and final prices.
The device itself isn't built yet. Its ball-tracking and edge-check software can already be tried in test versions of the CricketTech Android app, on a slow-motion phone video. See the development status.
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