How It Works
Understanding the Science Behind Your Drawing Score
4 Simple Steps
Choose a Shape
Select from 6+ challenges: circles, triangles, squares, stars, hearts, and lines
Draw the Shape
Use your mouse or finger to draw. Watch real-time color feedback as you draw
Get Your Score
Our algorithm instantly analyzes your precision and gives you a detailed score
Try Again
Keep practicing to improve. Track your progress and beat your personal best
🎯 Scoring System Explained
How We Calculate Your Score
Our advanced algorithm measures your drawing against a mathematically perfect shape. Each challenge uses specific metrics tailored to that shape's characteristics.
⭕ Circle Scoring
- ✓Roundness (40%): How circular is your shape?
- ✓Closure (30%): Did you close the loop perfectly?
- ✓Smoothness (30%): Is the line smooth without wobbles?
⭐ Star Scoring
- ✓Symmetry (35%): Are all points evenly spaced?
- ✓Angle Precision (35%): Sharp points at correct angles?
- ✓Shape Accuracy (30%): Overall star form correctness
🔺 Triangle & Square
- ✓Angle Accuracy (40%): Correct corner angles (90° or 60°)
- ✓Edge Straightness (35%): Straight lines, no curves
- ✓Closure (25%): Perfectly closed shape
❤️ Heart & Line
- ✓Curve Smoothness (40%): Smooth, even curves
- ✓Symmetry (35%): Balanced left and right sides
- ✓Shape Recognition (25%): Recognizable form
🏆 Rank System
S Rank - Perfect
95% - 100% Accuracy
Absolutely incredible! You're a drawing master. This requires exceptional precision and control.
A Rank - Excellent
90% - 94% Accuracy
Outstanding work! Your drawing skills are excellent. Just a bit more practice for perfection.
B Rank - Great
80% - 89% Accuracy
Great job! You have solid drawing skills. Keep practicing to reach the next level.
C Rank - Good
70% - 79% Accuracy
Good effort! You're on the right track. Try using practice mode with guides to improve.
D & F Rank
Below 70% Accuracy
Keep trying! Everyone starts somewhere. Enable grid helpers and practice with slower movements.
🎨 Real-Time Color Feedback
As you draw, your line changes color to show how accurate you are in real-time. This instant feedback helps you adjust your drawing on the fly.
Perfect
100%
Great
80-99%
Good
60-79%
Fair
40-59%
Poor
0-39%
💡 Pro Tips to Improve Your Score
✋ For Better Control
- • Draw at a moderate speed - not too fast, not too slow
- • Keep your wrist stable and move from your elbow
- • Practice on a larger screen if possible
- • Use a mouse pad for smoother mouse movement
🎯 For Circles
- • Start slowly to establish the curve
- • Maintain consistent distance from center
- • Close the loop exactly where you started
- • Try rotating your device while drawing (mobile)
📐 For Triangles & Squares
- • Focus on making sharp, precise corners
- • Draw straight lines between corners
- • Use the edge of your screen as a visual guide
- • Practice each side individually in practice mode
⭐ For Stars & Hearts
- • Think about symmetry while drawing
- • Count your points/curves mentally
- • Draw confident strokes for sharp star points
- • For hearts, make the curves smooth and even
🔬 Technical Details
How Our Algorithm Works
1. Point Sampling
We capture your drawing as a series of coordinate points at 60 frames per second.
2. Mathematical Comparison
Each point is compared to the ideal geometric shape using advanced mathematical formulas (e.g., distance from center for circles, angle calculations for polygons).
3. Multi-Factor Analysis
We analyze multiple dimensions: deviation from ideal path, smoothness of transitions, closure accuracy, and symmetry (where applicable).
4. Weighted Scoring
Each metric is weighted based on importance for that specific shape, then combined into a final score from 0-100%.
Privacy Note: All calculations happen locally in your browser. Your drawings are never sent to our servers or stored anywhere except your device.
Ready to Test Your Skills?
Now that you know how it works, put your knowledge to the test!
Start Drawing Now →