LineCall — interactive mockup

LineCall

Two-phone stereo line judge

Last session calls

Disputed calls

96%

Confidence rate

3.1cm

Avg margin

Scanning via Wi-Fi Direct…

Pixel 8 • Jason's Phone 2

Wi-Fi Direct — signal excellent

Both phones connect directly via Wi-Fi Direct — no router or internet required. Works on any court.

✓

Phones paired

Pixel 8 + Pixel 8 via Wi-Fi Direct

Detecting court corners…

Point at the full court from the baseline

Ready to record

Tap Start when detection is complete

LineCall • LIVE

0:00

Team A

–

Team B

Game 1 of 3 • Serve →

Recent calls

OUT

Left sideline

23 cm outside — Definite

Baseline

4.2 cm inside — Probable

Kitchen line (serve)

1.8 cm outside — Too close to call

OUT

23 cm outside left sideline

Bounce point

Confidence Definite

Stereo tracking

Cam 1 (baseline): 24 cm out · Cam 2 (net): 22 cm out
Sync offset: 1.2 ms · Ball speed: 41 mph

4.2 cm inside the baseline

Bounce point

Confidence Probable

TOO CLOSE

1.8 cm outside kitchen line — replay the point

Bounce point

Confidence Too close

Within 5 cm — replay the point per house rules. The app can't call this with confidence.

3D trajectory — top view

23 cm

Outside sideline

41 mph

Ball speed

1.2 ms

Cam sync offset

88%

Confidence

Timeline

Ball landed 23 cm outside the left sideline — OUT

3D trajectory — top view

4.2 cm

Inside baseline

36 mph

Ball speed

0.8 ms

Cam sync offset

73%

Confidence

Ball landed 4.2 cm inside the baseline — IN

3D trajectory — top view

±1.8 cm

From kitchen line

28 mph

Ball speed

2.1 ms

Cam sync offset

43%

Confidence

Within the 5 cm uncertainty zone — replay the point

Tap Start Match to walk through the full flow.
On the live screen, tap any call to see its detail and replay.