Phone Refresh Rate Test
UFO Test: measure your live refresh rate and frame rate.
Mobile browsers may cap the frame rate (iPhones often lock at 60Hz) — trust the rate stated in system settings, and disable power saving before testing.
Why test refresh rate on a phone?
UFO on your phone
The classic refresh-rate flying saucer runs fullscreen in mobile mode, so you can judge smoothness at 60/90/120/144 Hz with a single glance.
Real live reading
A rAF counter reports current Hz, peak Hz and stability, so you can verify the number your phone claims.
Immersive on iPhone too
Where the fullscreen API is restricted, UFO uses a full-viewport immersive mode that still covers the whole screen.
How to test
- 01 · Open on your phone
Landscape is best. Tap the phone mode, then Start.
- 02 · Watch the saucer
The smoother it glides, the higher your real refresh rate; stutter or jump points to a low rate or slow pixel response.
- 03 · Compare & confirm
Toggle half/quarter rate side by side and read the live Hz panel.
Frequently asked questions
My phone says 120Hz — why does the page read 60?
Battery/power saving or an automatic adaptive setting can drop the panel to 60Hz. Disable power-saving and confirm in system display settings, then retest.
Does refresh rate affect the touch test?
No — refresh rate is about redraws per second; touch sampling is separate. Run them on the same phone for a complete screen exam.
Is high refresh worth it on a phone?
For scrolling and gaming, yes — 90/120Hz feel clearly smoother. On OLED it can draw more battery, which is why LTPO adapts the rate.
Refresh rate basics
Common phone rates
- 60Hz: baseline — fine for basic use.
- 90 / 120Hz: noticeably smoother scrolling and gaming.
- 144Hz+ / LTPO: top-end adaptive rates that scale dynamically.
Why the number matters
- Redraws per second cap how smooth motion can look.
- FPS from games is separate — the lower of refresh rate and FPS wins.
- Low brightness may enable PWM — use the breathing test to check.