Binary Sudoku+ vs Gravity Labs

Binary Sudoku+: a calm binary logic puzzle. 1300+ levels and a new daily board. Three rules, endless depth: Fill the grid with two symbols. Every row and column holds an equal number of each. Never three of the same in a row. Challenge Your Mind with 1300+ Levels! 800+ Handcrafted Puzzles - From easy to expert! 500+ Challenge Mode Levels - Beat the clock! A new Daily puzzle every day. Sudoku × Symmetry - A satisfying new twist! Why Players Keep Coming Back: Addictive & Relaxing - Perfect for quick play or deep focus. Brain-Training - Sharpen logic & problem-solving skills. Fair ads - play first, not ads. Download Now & Start Solving!

The device itself is the lab instrument! Gravity Lab turns your iPhone or iPad into a pocket physics playground for young scientists aged 8–12. TILT TO EXPERIMENT Steer a marble through 8 hand-crafted mazes just by tilting the device. Dodge the holes, find the gaps, reach the flag — and feel how real physics behaves while you do it. FEEL THREE GRAVITIES • Earth — the world you know • Moon — 1/6 gravity, the marble floats like an astronaut • Jupiter — 2.4× gravity, heavy and fast! Some levels even switch gravity mid-run. Adapt, scientist! ICE OR SAND Slippery ice barely slows the marble; grippy sand brakes it fast. Friction stops being a textbook word the moment you feel the difference. LEARN WITHOUT READING A TEXTBOOK Every finished level shows a one-line Lab Note — a real science fact about what just happened. Galileo's marble experiment, why ice is slippery, how astronauts jump higher: science sneaks in one line at a time. EARN LIKE A SCIENTIST • 1–3 stars per level for speed and precision • Coins to spend on marble skins (galaxy, lava, glitter) • 6 scientist badges: Friction Finder, Gravity Guru, Momentum Master and more • A daily lab streak for coming back to experiment MADE FOR KIDS, TRUSTED BY PARENTS • No ads, no in-app purchases, no tracking • No account, no internet needed — works fully offline • No reading required to start playing • All progress stays on the device • Prefer not to tilt? Finger-steering mode is in Settings Pick up the lab. Tilt it. That's the whole instruction manual.