Pythagorea is graph-paper geometry stripped down to its cleanest form. You get a square grid, a tool for drawing straight line segments, and points to connect. There are no flashy reward animations, no timer pressure, and no ad pop-ups interrupting every three moves. It turns abstract concepts like perpendicular bisectors and the Pythagorean theorem into tactile logic puzzles.

The catch is that the app assumes players want to discover the logic themselves. It provides an accessible glossary, but when you hit a wall, there is no step-by-step hint system to bail you out. That makes it a terrific tool for co-playing alongside a kid who likes a challenge, but a potential brick wall for a student trying to fly solo through harder levels.