Every serve. Called.
ServeCheck watches the serve from a phone beside the court and tells you FAULT or LEGAL, with the picture the call was made from.
Below 1.15 m, at the instant of contact.
Under the Laws of Badminton, the whole shuttle must be below 1.15 m from the court surface at the instant the server's racket hits it. It is a fixed height, the same for every player, tall or short.
The moment of contact is over in a blink, and the shuttle is small. From the service judge's chair the call is hard to make and harder to argue with. ServeCheck shows that instant, so the call can be seen.
A session in four steps
Set up the phone
Put a phone on a stand beside the court. The app tells you when the view is right.
Start and serve
Start a session and serve as you normally would. No markers on the shuttle, no gear on the player.
See the call
Each serve comes back as FAULT or LEGAL, with the frame it was decided on.
Keep the picture
Save the call to your gallery or send it to the player, the coach or the other team.
Anatomy of a call
- 1
The verdict
FAULT or LEGAL, in plain view, with the serve number and the side of the court.
- 2
The frame
The moment the call was made on, straight from your own recording. Nothing is redrawn.
- 3
The 1.15 m line
The service height, drawn across the picture so anyone can see where the limit sits.
- 4
The shuttle mark
A fine cross-hair on the shuttle. It shows the shuttle without covering it.
- 5
The close-up
A 4× view of the shuttle and the line, for the serves that are close.
Real calls, real frames.
These two calls were made on one evening of trials. Each picture is saved to the phone the moment the call is made.
Two ways to use it
Training
For a player working on a low serve, alone or with a coach.
- Serve after serve, a call on each one
- See how close to the line you play
- Keep the pictures to compare sessions
Match After trials
Not available during trials. For club nights, leagues and friendly matches once trials end.
- A record of every serve in the match
- Challenge a service call and see the picture
- Share the call with both sides
What the video can and cannot show
A phone's video is good, not perfect. When it cannot show the serve clearly, ServeCheck tells you instead of guessing.
| On court | What ServeCheck does |
|---|---|
| The contact is clear | Calls it FAULT or LEGAL and shows the picture. |
| The shuttle is hidden by the body or the racket | Makes no call and says why. |
| Contact falls between two frames | Shows the nearest frame and tells you the call is close. |
| The court is too dark | Tells you before you start, so you can change the set-up. |
| The phone has been moved | Asks you to set up again before the next call. |
What you need
A smartphone
A recent phone with a good camera. The supported list comes with the release.
A stand
A tripod or phone stand that keeps the phone still beside the court.
A lit court
Normal indoor court lighting. The app tells you if it is too dark.
Pricing
Announced at launch.
ServeCheck FAQ
Is a ServeCheck call official?
No. ServeCheck is a training and club tool, in club trials now. It is not approved by any federation, and the umpire or service judge decides the call.
Is ServeCheck patented?
A patent application for ServeCheck has been filed in India. Patent pending.
Does my video leave my phone?
No. Footage stays on the phone that recorded it. The pictures you choose to save go to your own gallery, and you decide who sees them.
Which phones does it run on?
We are testing on a range of recent phones in club trials. The supported list will be published with the release.
Does it work in a match?
Not yet. During trials ServeCheck is for training and testing only. Match mode comes after.
What happens when it can't decide?
It makes no call and tells you why: the shuttle was hidden, the light was too low, or the phone moved. It never guesses.
Can I share a call?
Yes. Every call is a picture you can save and send to a player, a coach or the other team.
When can I get it?
ServeCheck is in club trials now. Join the early-access list and we will write to you when it opens up.