Pocket Cosmos: Gravity Sandbox

A universe in your pocket. Tap anywhere and a planet is born, tracing its orbit under real N-body gravity — a simple toy you can watch forever. WHO IT'S FOR - You enjoy watching physics and space simulations - You want something calm to play with during short breaks - You'd like to show kids what gravity actually does - You love sharing beautiful screenshots HOW TO PLAY - TAP to spawn a planet — it automatically orbits the dominant body - DRAG to slingshot a new body. The predicted path is shown before you release, so you can aim for a perfect orbit - LONG-PRESS to create a black hole that devours everything nearby - PINCH & PAN to zoom around your universe 5 SCENARIOS - Solar System: planets and a comet around a central star - Binary Stars: two suns waltzing around their barycenter - Galaxy Collision: two clusters spiral into each other - Chaos: a random N-body playground - Empty Space: build your own system from nothing DETAILS & FEATURES - Star color follows mass (light = orange, heavy = blue-white). Merge bodies to grow a star - Collision particles, flashes, sound effects and haptics - Time warp from 0.25x to 4x, plus pause - One-tap screenshot sharing - Available in 8 languages PRIVATE BY DESIGN - No ads, no in-app purchases - No data collection, no account - Works fully offline — even in airplane mode On the train, in bed, between classes — bend gravity with a fingertip.