HLAT — Human Latency Test

Measure your reaction time, mouse precision, memory & polling rate.

HLAT is a precision benchmarking tool for measuring your reaction time, input accuracy, short-term memory, and device polling rate — all with millisecond accuracy.

Whether you're a competitive gamer tuning your setup, a researcher collecting reaction-time data, or just curious how fast your reflexes really are — HLAT gives you clear, reliable numbers.

Tests
Latency Test

Measure how fast you react to visual and audio stimuli. Four variants: Visual+Tap, Visual+Keyboard, Audio+Tap, Audio+Keyboard. Each runs 5 trials with randomized delays. Results show average, minimum, and maximum reaction times.

Precision Test

Tap targets at random positions and sizes. Measures hit accuracy, reaction speed, and movement initiation time. Sessions of 10, 20, 30, or 60 seconds.

Memory Test

A 3x3 grid flashes highlighted squares — repeat the pattern in order. Three difficulty levels control flash speed, delay, and pattern complexity.

Polling Rate Test

Measures your touchscreen or input device report rate in Hz. Move your finger continuously while the app timestamps every input event.

Key features
  • Millisecond-precision timing using low-level input handlers
  • Audio stimulus via real-time 440 Hz sine wave generation
  • Configurable audio engine: sample rate and buffer size adjustable in Settings
  • Clean dark interface designed for minimal visual distraction
  • Real-time FPS overlay to monitor frame timing
  • No ads. No accounts. No data collection.
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