Logic Arcade vs Beacons

Eight classic math and logic puzzles in one app. No ads. No accounts. Just puzzles. GAMES INCLUDED: - Water Jugs — Measure a target volume by filling, emptying, and pouring between jugs. Based on Bezout's identity and the Extended Euclidean Algorithm. - Tower of Hanoi — Move stacked disks between rods without placing a larger disk on a smaller one. Includes the classic 3-rod puzzle and the 4-peg Frame-Stewart variant with a custom sandbox mode. - Sliding Puzzle — Arrange numbered tiles in order on grids from 3x3 to 6x6. The original 15-puzzle, popularized in the 1880s. - Lights Out — Toggle lights on a grid where each press flips neighboring lights. Rooted in linear algebra over GF(2). - Knight's Tour — Guide a chess knight to visit every square exactly once. Studied by Euler, solved by Warnsdorff's heuristic. - Egyptian Fractions — Decompose fractions into sums of distinct unit fractions. Features authentic hieroglyphic numeral display. - Turntables — Rotate interlocking rings to arrange colored tokens. A physical model of permutation groups and Hungarian Rings. - River Crossing — Ferry the wolf, the goat and the cabbage (and later wolves, sheep, oxen and a sheepdog) across the river without anyone getting eaten. Alcuin's 1,200-year-old puzzle and the missionaries-and-cannibals problem. FEATURES: - Up to 40+ hand-crafted campaign levels per game - Chapter-based progression with increasing difficulty - Auto-save and resume — pick up right where you left off - "The Math" — brief explainers on the theorem behind each game - Personal best tracking for moves and time - Free Play / Random mode for 5 games + custom sandbox for Tower of Hanoi and Knight's Tour (Pro) - Works completely offline - No ads. No tracking. No data collected. UNLOCK FULL GAME: Chapter 1 of every game is completely free. Unlock the full game with a single one-time purchase to get chapters 2-4 across all 8 games, Free Play mode (with chapter 1 Random unlockable for free by beating the chapter), custom sandbox modes for Tower of Hanoi and Knight's Tour, and all future content.

Beacons is a calm, beautiful logic puzzle about lighting up the coast. Each board hides one simple rule: place a single beacon in every row, every column, and every colored stretch of coastline — but no two beacons may stand next to each other, not even diagonally, or their beams would cross. There's no luck and no guessing. Every puzzle has exactly one solution, and every solution can be reached by pure deduction — so a win always feels earned. Start with the smallest coves, watch each beacon rule out the cells around it, and feel the whole board click into place. 400 HAND-VERIFIED LEVELS Work through 400 puzzles across four difficulties — Easy, Medium, Hard, and Expert, 100 each — that ramp up smoothly as your skills grow. Every single board is checked by a solver to guarantee a unique, logic-only solution before it ships. Clear a level to unlock the next, then come back to beat your best time. PLAY YOUR WAY • A clean, glowing dusk-harbor look that's easy on the eyes. • Tap to light a beacon, tap again to mark a rock, once more to clear. • Optional auto-mark to rule out cells for you. • Undo any move, or take a hint when you're stuck. • A built-in timer and your best time saved for every level. • Clashing beacons light up red, so mistakes are obvious and easy to fix. NO NONSENSE — JUST PUZZLES • 100% offline. No internet connection required — play on a plane, on the subway, anywhere. • No ads. Ever. • No in-app purchases. Everything is included. • No account, no sign-up, no login. • No tracking and no data collection — your progress stays on your device. Just you, the coastline, and a quiet puzzle to solve. Light every beacon and secure the coast.