Linesman Front-foot no-ball detection Waitlist ↓

A phone. A tripod. A verdict.

Was it a
no-ball?

At club level nobody is watching the feet. Linesman watches every delivery, finds the frame where the front foot lands, and checks it against the line.

Over 14 · Ball 1
Fig. 1 — Bowler's end, plan view · drag to take over Heel behind or on the line = fair. All of the foot beyond it = no ball.

How it works

  1. 1

    Set it up

    Put the phone on a tripod where it can see the popping crease. Tap along the line once so Linesman knows where it is.

  2. 2

    Bowl on

    Linesman finds the frame where each front foot lands and checks it against the line. Every ball, not just the ones somebody shouts about.

  3. 3

    Settle it

    You get a still of the landing, the line, and how far over. Show the batter, show the captain, get on with the game.

The umpire is watching the ball, the batter and the stumps. Nobody is watching the feet.

The law isn't about the toe. Some part of the front foot has to land behind or on the line, so the call comes down to the heel, and that is very hard to see in real time.

Pro cricket has cameras and a third umpire. A village side on a Saturday has a flask of tea.

  • Is front-foot no-balls, from a phone you already own.
  • Isn't LBW, ball tracking, or anything that needs sensors.
  • Status being built now. Looking for a few clubs to test it.

Put your club
on the list.

Leave an email and we'll get in touch when testing opens. Nothing else.

We'll only use your email to tell you about Linesman.