Purpose-Built
A tactile topology puzzle game where loops, crossings, twists, and linked rings obey consistent rules, and every solution can be replayed as a clean sequence.
One-time iPhone and iPad app
Knotspan
Untangle without cutting
Core Features
- Drag a strand segment to propose a local move.
- Crossing order and loop continuity are always preserved.
- Legal simplifications reduce the diagram without cutting.
- Expert trials require matching invariants, not just appearance.
Private by Design
No account, subscription, ads, tracking, third-party analytics, or developer-operated backend. Core features work offline, and your work stays on device unless you deliberately share or export it.
Use It Responsibly
Knotspan is a fictional entertainment game. Its visual systems, scoring, physics, maps, and terminology are designed for play and are not professional guidance.