Kinetic Cradle
A 3D physics laboratory where you control gravity.
Kinetic Cradle is not just another Newton's Cradle simulator. It's a 3D physics laboratory where you control gravity itself. Pull a chrome ball. Release it. Watch the momentum travel through the chain with satisfying clacks and precise physics. Then change everything — swing on the Moon's gravity for dreamlike slow motion, crank it to Jupiter for aggressive power swings, or float in zero-G aboard the ISS.
Swing on any planet
Switch between 12 different gravitational environments in real time. Each planet's physics dynamically change how the balls swing, collide, and settle. Watch the same cradle behave completely differently on Mercury vs. the Sun.
Full 3D, any angle
Unlike flat cradle apps, Kinetic Cradle renders a complete 3D model with dual V-shaped strings, a polished frame, and a physical base plate. Orbit the camera 360° around the cradle. Enable cinematic auto-rotate mode and watch it spin slowly like a jewelry display.
7 premium themes
Polished chrome, deep obsidian, royal gold, rose gold, crystal glass, glowing neon, and handcrafted premium wood. Each theme uses physically-based rendering with realistic reflections, clearcoat shine, and environment-mapped materials.
Live camera background
Point your camera at your desk and watch the cradle appear to sit on your real table — a lightweight AR-style effect. Switch between front and back cameras. No photos or videos are captured.
Ambient effects
Surround the cradle with gentle snowfall, soft rain, glowing fireflies, drifting stardust, rising embers, or floating bubbles. Each effect uses GPU-accelerated particles with natural organic movement.
Tuned to feel right.
Small details that add up to a desk toy you'll actually keep open.
Customize your physics
Adjust elasticity from rubbery absorption to perpetual-motion bouncy. Tune friction from smooth to heavy. Change string length from short to long.
Free-touch interaction
Touch any ball — not just the edges. Drag in any direction, and the correct group of balls follows naturally, respecting Newton's Cradle momentum transfer rules. Release with a flick to add velocity.
Repeat mode
Enable infinite zen mode: when the balls settle, they automatically restart with your last pull. Combined with auto-rotate, it becomes a mesmerizing desk companion.
Refined sound & haptics
Collision sounds scale naturally with impact velocity — loud clacks fade to whisper-quiet taps as energy dissipates. Five sound styles from deep and thick to bright and thin. Precise haptic feedback on every collision.
Multi-language
Automatic device-language detection. Available in English, Turkish, Japanese, German, and Spanish.
Designed for all devices
Fully responsive on every iPhone from SE to 16 Pro Max. Supports iPad with adaptive 3D quality.