Aim Test — Free Aiming Speed and Accuracy Trainer

The aim speed test starts timing only when you hit the start circle in the middle of the screen; taps before that are not recorded, so settle into a comfortable position first. Then 30 targets appear one at a time, cycling through small, medium and large (about 6, 10 and 14 mm across) in that order. Each new target spawns at a random spot at least 25% of the screen's shorter side away from where you last tapped, so every target needs a real movement. There is no time limit per target, and the next one appears the instant you hit.

Each target's time runs from your previous hit to this hit, so it covers both spotting the new target and moving to it. A tap outside the circle counts as a miss; the target stays put and the clock keeps running, so a miss lowers your hit rate and lengthens that target's time. Hit rate is your 30 hits divided by all taps. Finger taps get a 4-pixel tolerance around the circle, since the fingertip hides the target. Your input type (touch, mouse or pen) is detected from the first tap and shown with the result, and a hit rate below 80% adds a suggestion to slow down slightly.

Throughput rests on Fitts's law (Fitts, 1954). Following the Shannon formulation proposed by MacKenzie (1992), the test gives each target a difficulty ID = log₂(D/W + 1), where D is the distance from the point you actually tapped last to the new target's centre and W is the target's diameter. A target 3 diameters away, for example, has log₂(3 + 1) = 2 bits; hit it in 0.5 seconds and that target's throughput is 4 bits/s. The throughput on your result screen is the average of these values over all 30 targets, so hitting harder (farther, smaller) targets in the same time raises it.

Research using the ISO 9241-9 standard replaces nominal target size with an 'effective width' computed from how widely your actual taps scatter (Soukoreff & MacKenzie, 2004). This test uses the nominal diameter and, since targets pop up at random spots, includes search time, so its number sits on a different scale. Method matters a lot: in that review, mouse throughput in 9 standard-conforming studies clustered at 3.7–4.9 bits/s, while 24 earlier studies ranged from 2.55 to 12.5 bits/s. The result-screen bands (under 2.5, under 4, under 6, 6 and up) are Soundary's rough guide, not population norms, so compare your throughput with your earlier runs on the same device.

This test is 2D aiming: one quick movement to a target that stays still. Aiming in a first-person shooter adds camera rotation governed by mouse sensitivity, tracking of moving targets, and input latency. Long and Gutwin (2019) point to earlier studies in which game targeting was significantly hurt by latency as low as 41 ms, and in their own study the effect of latency differed across four devices: touchscreen, mouse, controller and drawing tablet. So read this score not as your whole gaming skill but as one component: moving your hand to a static target quickly and accurately.

Finger touch has a limit that a mouse does not. Bi, Li and Zhai (2013) describe touch error as two parts: one that follows the speed–accuracy trade-off, and an absolute imprecision of the finger itself that remains however slowly you tap. So on touch, misses on the smallest targets (about 6 mm across) may not be purely about aim. Target sizes are also set in screen pixels, so their physical diameter varies somewhat with your device's screen and your browser zoom. When comparing records, keep not just the device but also the browser zoom and mouse sensitivity unchanged.