AltF original
Perfect Circle
One stroke. No undo. Find out how round you really are.
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How it works
- 1Press and hold anywhere on the canvas, then draw a circle in a single unbroken stroke.
- 2Release when you get back to where you started.
- 3The dashed line shows the perfect circle your stroke was measured against.
About this one
The score is the variation in your stroke's distance from its own centre, so it does not matter how big you draw — a small careful circle beats a large sloppy one. A stroke has to sweep most of the way round to count, which is why a short arc does not score 99%.
Built and hosted by AltFTool. Free, no account, no third-party trackers, and it runs entirely in your browser.
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