Practical guide
Why Reaction Time Differs Between Phone and Desktop
A reaction-time result includes both your response and the technology that displays and delivers it. Phone and desktop results can differ even when the same person takes the same test.
Updated September 2, 2026
The measurement path
A browser test starts timing when it activates the visual signal and stops when the corresponding pointer event reaches the page. Between those moments, the signal must be rendered on a display, noticed, acted upon, and reported through touch or mouse hardware and the operating system.
ReflexMint uses the browser's high-resolution performance timer for the interval, but that accurate clock does not remove display or input latency from the full path.
Display refresh and processing
A display updates in frames. At 60 Hz, a new frame arrives about every 16.7 milliseconds; at 120 Hz, about every 8.3 milliseconds. The cue can only become visible when a frame presents it, and display processing may add more delay.
Refresh rate alone does not determine the result. Browser scheduling, power-saving modes, display response, and background work also matter. A higher refresh rate can reduce one source of delay without making two devices perfectly comparable.
Touch and mouse are different inputs
A touchscreen reports contact through a touch and pointer pipeline, while a mouse reports switch activity through wired or wireless hardware. Touch posture, finger travel, mouse polling, click mechanics, and operating-system processing differ. Some people also position a finger over the target area differently from a mouse cursor.
Neither input method is universally faster in every setup. The important point is that changing input method changes the measurement conditions.
Make comparisons more meaningful
Compare complete five-round averages on the same device, display mode, browser, and input method. Keep the tab visible, close demanding background work, and avoid guessing before the signal. Repeating several complete runs is more informative than comparing one unusually quick attempt.
Reaction-time browser tests are practical personal benchmarks. They are not medical or neurological assessments, and differences between devices should not be interpreted as changes in health or cognition.