About AngleSnap
AngleSnap is a free browser-based precision game that tests how well you can estimate angles by eye. Each round you're shown a target angle in degrees — anywhere between 15° and 165° — and have to draw it on a canvas as accurately as possible. Your round score is 100 minus the absolute difference between your drawn angle and the target. Five rounds give you a final average out of 100. No account, no download, plays on any device.
How to play AngleSnap
Click anywhere on the canvas to set the second point of your angle. The first segment is fixed in place; your cursor's position relative to the origin defines the second segment, and the angle between them is what gets scored. Mouse, trackpad, and touch all work. The optional Hardcore mode adds a slow rotation to the base segment, which forces you to predict where it'll be at the moment you click — useful for training reaction-corrected estimation.
Tips for higher scores
Lean on mental references: 90° is a right angle (perfect L-shape), 180° is a straight line, 60° is the angle at each corner of an equilateral triangle, and 45° splits a right angle in half. Build your guess from the closest reference and adjust from there. In Hardcore mode, the base segment keeps rotating after you've started aiming — predict its position when your click registers, not its current position, since there's a small input lag.