Perfect Circle

Draw a circle in one stroke with your finger or mouse, and we'll tell you how close it is to perfect, in percent. We measure how even the distance is from the center to every point on your line, and how well the start and end meet. On the result screen, you can see your circle laid over a perfect one and share it as an image.

How to play

1. Put your finger on the drawing area and draw a circle.
2. Keep your finger down and go all the way around back to where you started.
3. Your accuracy is calculated as soon as you lift your finger.
4. If it's too small or doesn't go all the way around, you'll need to draw again.

Tips for a better record

• Move your whole arm instead of just your wrist for a smoother line.
• Draw at a steady pace, not too fast and not too slow.
• A big circle that fills the area is easier to draw accurately than a small one.

Grades

• ⭕ Perfect Circle · 97.0% or more
• 🧭 Human Compass · 92.0% or more
• 🛠️ Circle Crafter · 85.0% or more
• 🍩 Pretty Round · 75.0% or more
• 🥔 Potato Shape · Fewer than 75.0%