Circle Judge vs One Circle

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

One Circle is a minimalist yet surprisingly addictive circle-drawing challenge. The idea is simple: draw a circle on the screen, and the app instantly evaluates your stroke using roundness, closure, and smoothness to produce a score and grade. Every attempt is quick, clear, and satisfying, making it easy to jump back in for one more try. It works as a light casual game, but it is also a fun precision challenge. There is no complicated setup and no long tutorial. Open the app, draw once, and get your result within seconds. If you want to take it further, sign in to save your scores and drawing paths, review your personal history, track your best performances, and submit your top results to the leaderboard. Global, Today, and 7-Day rankings help turn every great score into a real challenge. You can also turn your latest result into a shareable score card, save it as an image, or send it directly to friends so every near-perfect circle is worth showing off. Main features: - Draw a circle and get scored instantly - Score grades and multi-factor feedback - Save results and path history - View history details - Global, Today, and 7-Day leaderboards - Shareable score card export - Email OTP sign-in - English and Chinese language support - Privacy policy, user agreement, and account management settings If you enjoy simple, fast, replayable experiences, One Circle is built to make you want just one more attempt.