Circle Judge - Roundness Check

Draw a circle freehand and get its roundness (circularity) scored. The app analyzes your stroke automatically and instantly shows how close it is to a perfect circle in percent.

● Features

• One-tap scoring: draw a circle and lift your finger—shows 0–100% roundness
• Easy comparison: overlays a same-size reference circle (toggle on/off)
• Customization: freely choose pen color and guide color
• Simple sharing: share the drawn circle as an image with the score
• Appearance: supports Light/Dark Mode

● Great for

• Practicing steady, freehand circles
• Visualizing and improving hand jitter in design/sketching
• Having fun “roundness challenges” with friends and family

● How to use

1. Trace a circle with your finger on the screen
2. Lift your finger to auto-score and show the reference circle
3. Tap Share to send a square image with the score