Perfect Drawing Contest

Can you draw a 99% perfect circle, five-pointed star, or parametric heart in a single freehand stroke? Perfect Drawing Contest turns pure Euclidean geometry into an addictive, meditative test of hand-eye precision.

No rulers. No templates once your finger touches the glass. Just one continuous motion and an uncompromising mathematical fitting engine that evaluates every millimeter of your stroke in real time.

CORE FEATURE HIGHLIGHTS
- 7 Classic Geometric Challenges: Master the Circle, Equilateral Triangle, Square, Regular Pentagon, Regular Hexagon, Five-Pointed Star, and Parametric Heart.
- Sub-Degree Mathematical Fitting Engine: Powered by Kasa least-squares circle fitting, polar line-equation circumradius inversion, and Golden-Section continuous angle optimization for sub-degree (under 0.05 deg) accuracy.
- Real-Time Heatmap & Potential Score: Watch your stroke shift from ruby red to emerald green and championship gold as you draw, complete with live potential max score estimation and a magnetic closure snap ring.
- Instant Structural Diagnostics: Understand exactly where points were lost with clear post-round diagnostic pills for Closure Gap, Corner Sharpness, Edge Straightness, Radial Symmetry, and Multi-Loop Overlap.
- Grandmaster Ranks & One-Tap Score Cards: Earn A, S, and S+ Grandmaster badges across all 7 shapes and generate high-contrast score cards to challenge friends.
- 9 Global Languages Included: Switch effortlessly inside Settings between English, Simplified Chinese, Traditional Chinese, Japanese, Korean, Spanish, French, German, and Portuguese (Brazil).

100% ON-DEVICE PRIVACY GUARANTEE
Perfect Drawing Contest operates 100% offline on your iPhone and iPad. There are zero accounts, zero sign-ups, zero tracking SDKs, and zero third-party advertisements. Your personal best scores and language preferences are stored exclusively in local device storage.

HOW IT WORKS
1. Select any of the 7 geometric shapes from the top picker bar.
2. Trace the shape in one smooth, continuous stroke and close the loop near your starting anchor.
3. Lift your finger to reveal your fitted reference outline, segment accuracy heatmap, diagnostic breakdown, and Mastery Rank.

DEVELOPER SUPPORT
Questions, feedback, or feature requests? Reach out anytime at fangdev1063@gmail.com or visit https://boardgamevoice-commits.github.io/perfect_drawing/.