The AI video-based Line Judge
Confirm
Me that
Ball Mark.
In/Out installs on any net post in no time and calls lines with millimeters accuracy — using the same AI that powers self-driving cars.
One Device. Three Superpowers:
AI Judge, Video, Stats.
Mount In/Out on any net post in under a minute. It's ready to call lines, record your match, and analyze every shot.
Real-Time Line Calling
Instant audio and visual signals for every call. No delays, no arguments.
Stream or store video
Full-court video: Stream live to your phone or save to internal memory.
Pro-Level Stats
Shot placement maps, serves and shots speeds — just like on TV.
AI Coach
Cloud-powered opponent analysis suggests the optimal strategy for every match.
Portable for any net post
Install in seconds with the smart attach and the court auto-calibration.
Android & iOS App
Companion app for stats review, live streaming, and AI coach reports.
CSV / JSON Export
Raw shot data for deep analysis in Excel or custom dashboard.
Free Cloud
No recurring fee, free update, all free cloud features.
One-time purchase · No subscription · Free domestic shipping
Real Courts. Real Players.
Real Calls.
Watch In/Out perform live across every skill level — from weekend warriors to WTA stars to social media influencers. The device doesn't lie, whoever you are.
Casual Players
Your Weekend Match, Transformed with It
Think In/Out is only for serious players? Watch two casual players step onto court and let the AI umpire make the calls. The reaction says it all. Setup takes less time than stretching.
WTA Champion
Samantha Stosur Training with It
Grand Slam champion Samantha Stosur has played on courts with full Hawk-Eye setups her entire career. See her training with In/Out on court.
Social Media
When an Influencer has Fun With It
Ian Westermann is THE tennis influencer. Authentic reaction is the best product demo.. No pre-arranged setup, this is first time encounter with the device.
Millimeter Accuracy.
Proven by Videos.
Exhibit A: Even the pros get it wrong
Zverev Calls a Ball 30cm Out — That Was 30cm In
This isn't a bad day. This is the human visual system doing its best — and failing. Watch Alexander Zverev, world top-5, confidently overrule a ball that was clearly inside the line. This is exactly the problem In/Out was built to solve. One device. No more mistakes like this.
Exhibit B: Stress test
Calling a Cannonball at Full Speed. No Problem
What happens when you fire a ball at the edge of the line? In/Out tracks, identifies and calls it — in real time, without flinching. The same AI that sees cannonballs sees your hardest serve. Accuracy doesn't have a speed limit.
Deep Stats Analysis.
AI Coach, Free, Forever.
Every ball tracked. Every shot mapped. Every weakness exposed — yours and your opponent's. In/Out doesn't just call lines, it builds a scouting report on every player you've ever faced. Your own coaching staff, for the price of a one-time purchase.
Inside the AI dashboard
Your Opponent Has Weaknesses. The AI Already Found Them.
This screencast walkthrough shows the full power of the In/Out cloud platform: where your opponent is vulnerable, which of your shots are working, and the exact strategy to beat them next time. This isn't generic advice — it's computed from your actual match data. No coach required.
No coaching subscription. No monthly fee. Just your data, your AI.
One Purchase.
Zero Recurring Fees — Ever.
Every option includes AI line judge, HD video, pro stats and free cloud coaching.
Choose the accuracy level that fits your game. Upgrade any time.
CASUAL
PLAY
1 Net Device
No subscription
-
AI Line judge -
One Net device with the smart attachment -
Court auto-calibration -
Real-time light & sound line calls -
Free cloud stats & AI coach forever -
Android & iOS companion app -
Free firmware updates for life
SERIOUS
AMATEUR
1 Net Device + 2 Line Device
No subscription
-
AI Line judge with great accuracy -
1 Net device with the smart attachment -
2 Line Devices for base lines accuracy -
Court auto-calibration -
Real-time light & sound line calls -
Free cloud stats & AI coach forever -
Android & iOS companion app -
Free firmware updates for life
CLUB
& PRO
2 Net Devices + 6 Line Devices
No subscription
-
AI Line judge with maximum accuracy -
2 Net devices with the smart attachment -
6 Line Devices for all lines accuracy -
Court auto-calibration -
Real-time light & sound line calls -
Free cloud stats & AI coach forever -
Android & iOS companion app -
Free firmware updates for life
Choosing your setup
How Many Devices Do You Actually Need?
Not sure whether to start with one Net Device or go straight for the full setup? This video breaks down the real-world accuracy difference between each configuration, so you can invest with confidence and know exactly what you're getting on court.