Perfect Circle

Drawing a perfect circle by hand is a classic test of human motor control, patience, and visual precision. This game gives you a digital canvas to find out how close your hand can get to drawing a true geometric circle with a single, continuous finger motion.

Place your finger on the screen, draw around the center anchor point in one smooth stroke, and close the loop. As soon as you lift your finger or seal the path, the evaluation engine measures your shape and calculates your exact accuracy percentage from 0 to 100 percent.

HOW THE ACCURACY SYSTEM WORKS

The game evaluates your circle using geometric analysis based on radial consistency and path completion:

- Real-Time Color Feedback: While you draw, the stroke dynamically changes color based on distance from the center. Clean, consistent curves stay green, slight wobbles turn yellow, and larger deviations turn orange or red.
- Radial Uniformity: The calculation measures the distance from the center point to every captured coordinate along your stroke. The more consistent your radius remains throughout the entire rotation, the higher your score.
- Loop Closure Check: A circle must be a closed shape. If you lift your finger too early or leave a wide gap between your starting and ending points, the game identifies the incomplete path and asks you to close the loop properly.

FOUR GAME MODES

Test your drawing consistency across four distinct play modes:

1. Classic Freeform
Take your time without any artificial pressure. Focus entirely on steadying your finger and arm movements to produce the most accurate circle possible.

2. Time Attack
You have exactly five seconds to begin, draw, and close your circle. A countdown clock runs as soon as you touch the screen, testing whether you can maintain smooth curvature under time pressure.

3. Target Size Challenge
A faint guide ring appears on the screen set to a specific diameter: Small, Medium, or Large. Your goal is not only to draw an accurate circle, but to match the intended radius of the target ring as closely as possible.

4. Blindfold Memory
Once your finger touches the screen, the center anchor point and live accuracy indicators disappear completely. You must rely solely on your spatial awareness, muscle memory, and hand-eye coordination to complete the shape.

DETAILED STATS AND PERFORMANCE TRACKING

Track your progress over time with built-in local statistics:

- Personal Best: Keep track of your highest recorded accuracy score.
- Precision Average: See your overall average accuracy calculated across all completed attempts.
- Performance Tiers: Review how many of your attempts fall into accuracy brackets, from practice attempts up to master-level scores above 90 percent.
- Attempt History: Browse your recent drawing history with clear timestamps and individual percentage ratings.

DESIGNED FOR FOCUS

- Fully playable offline without an internet connection.
- No sign-ups, accounts, or personal data collection required to play.
- Smooth touch responsiveness tuned for both phone and tablet screens.
- Optional subtle sound effects and haptic vibration feedback that can be toggled on or off at any time in the settings.

Whether you want a quick two-minute break to test your reflexes or want to practice drawing a perfect circle consistently, this game offers a focused, distraction-free environment to test your precision.