HOW TO USE

1) Set LOAD on Page 1 (0–100%)

2) Press START for fullscreen

3) HUD shows FPS + long frames (jank/spikes)

4) Exit with ESC or tap/click

WHAT THE HUD MEANS

FPS: smoothed frame rate

P95 ms: “bad-frame” time (lower is better)

JANK: frames > 20ms (noticeable stutter)

SPIKES: frames > 33ms (big hitch)

TIPS

Battery saver: can throttle CPU/GPU

Thermals: hot phones may slow down

Compare: try different browsers

FAQ

Why not “true” Hz? this measures browser rendering cadence.

Why does FPS match 60/120? V-Sync to your screen refresh.

What is jank? long frames that cause stutter.

How do I exit? ESC or tap/click.

MINI BLOG (SHORT)

Smoothness is about consistency, not just average FPS.

A stable 60 can feel better than 90 with spikes.

Use LOAD to compare performance modes.

KEYWORDS (NATURAL)

fps test • frame rate checker • frame time

stutter test • jank test • performance test

browser smoothness • vsync