Eikonal vs Tile Fitting Puzzle

Eikonal is a physics-accurate optical puzzle game. Place and rotate mirrors, prisms, and lenses on a dark canvas, and watch real light rays bend, reflect, and split in real time. There is no submit button — the puzzle recognizes itself as solved the moment your ray field reaches every target. Named after the eikonal equation, the mathematical foundation of geometric optics, the game simulates light the way it actually behaves: angle of incidence equals angle of reflection, white light disperses into red, green, and blue through a prism, and lenses converge and diverge beams along their true paths. 100 PUZZLES ACROSS 5 CHAPTERS • Reflections — Mirrors. Bounce light to the target. • Refraction — Prisms. Split white light into its spectrum. • Convergence — Lenses. Focus and diverge beams. • Channels — Beam splitters and fiber. Guide multiple paths at once. • Caustics — Diffraction and curves. The master class. LIGHT THAT FEELS ALIVE Every move updates the entire ray field instantly. Nudge a mirror a degree and the whole scene of light shifts with it. The simulation runs continuously, so solving is a tactile, exploratory act — not a guess-and-check. DESIGNED FOR iPHONE AND iPAD Smooth, responsive ray tracing. Glowing beams against a near-black field. Built for iOS 17 and later, with full iPad support in every orientation. NO NOISE No ads. No in-app purchases. No accounts. No internet required. Just you, the light, and the puzzle. Solve with light.

Move triangle pieces and complete the shape. No timer, no score. A soft, paper-like look, and a puzzle you can enjoy at your own pace. There are four ways to play. Classic is the core puzzle of fitting triangle pieces onto the board, with 92 puzzles from Easy to Advanced. Extra leaves one piece over. Work out which one you do not need. Edge Match asks you to fill the shape and also match the colors on touching edges. 3D asks you to stack blocks into the same solid as the target. There are 24 puzzles. In 3D mode, drag the target to see it from any angle and pinch to zoom. The blue face touches the floor, so you always know which way is down. Double-tap to turn a block, triple-tap to flip it over. Controls are gentle. Drag to move and double-tap to rotate. You can pick up placed pieces again. A hint shows only the next piece. Undo and redo are supported. A calendar lets you look back on the days you played and the puzzles you cleared. Light and dark appearance, Japanese and English. Ads appear only after a while of play, when you start the next puzzle, and can be removed with an in-app purchase. A quiet moment, one piece at a time.