Eikonal vs Glowire

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.

Glowire is a calm circuit puzzle about one simple thing: getting the current where it needs to go. Rotate the wire pieces, drag them onto the board, and send power from the source to every bulb. When the last one lights, the whole circuit surges — and the board glows. ENDLESS, NEVER THE SAME Every level is generated fresh, so you never run out and you never replay the same board. Each one is guaranteed solvable — no dead ends, no unfair grids. A GENTLE LEARNING CURVE The first grids are small and forgiving. Then the components arrive, one at a time, each explained the moment you first meet it: • Diodes — current flows one way only • Resistors — some bulbs are sensitive and need one in the path • Switches — closed or open, your call • AND gates — power passes only when every input is live DAILY CHALLENGE A new circuit for everyone, every day. Build a streak, fill in the calendar, and go back to make up any day you missed. Complete a full month and you earn that month's collectible component. CIRCUIT IQ Your rating grows with clean, quick solves and climbs through the ranks. Stars, best scores and play stats are all tracked, so you can watch yourself get sharper. COLLECT AS YOU GO Unlock circuit boards as you progress and collect components month by month. Duplicates stack, so there's always something to add. BUILT TO BE PLEASANT No timers on your back. No lives, no energy meters, no waiting. Play a single board in a minute or lose an hour in it — the game doesn't mind either way. Free to play, supported by ads. An optional rewarded ad can give you a hint when you want one; you never have to watch it. Plays completely offline. Available in English, Turkish, Spanish, French and German. Can you light them all?