OptiUniverse vs Twinkleton

Explore the Solar System in 3D on your iPhone. Get close to Saturn's rings, discover Jupiter's cloud bands, inspect Earth, and choose a space mission to replay. OptiUniverse brings planets, moons, and spacecraft journeys together in an interactive universe built for curiosity. Browse celestial destinations, move freely around each world, and learn through detailed visuals and concise science facts. EXPLORE PLANETS AND ORBITS - Discover planets, moons, and distant worlds with detailed 3D materials, atmospheres, and rings. - Pan, pinch, and rotate to find your own perspective, or follow a celestial object. - Read object facts and orbital information in panels that adapt to the available space. - Preview supported transfer routes and follow navigation progress in the top bar. - Explore a solar-system simulation synchronized to the current date using offline planetary ephemerides. MADE FOR IPHONE DUO - Explore on the outer and inner displays, in portrait and landscape. - Browse a mission carousel on compact screens or multiple mission cards and a destination grid on wider screens. - Keep exploring as the layout changes, with native navigation controls and a scene that extends to the screen edges. REPLAY SPACE MISSIONS - Follow Voyager 1 from launch through its Jupiter and Saturn flybys to its journey beyond the heliosphere. - Watch Crew 13 travel from Earth to docking with the International Space Station. - Explore Artemis II's Earth-Moon-Earth journey and Starship Flight 14's launch, deployment, and return. - See mission status in the navigation bar and simulation time alongside the scene controls. Mission replays are compressed, illustrative visualizations. Spacecraft sizes, trajectories, and timing are adapted for clarity; they are not live spacecraft tracking or telemetry reconstructions. From a quick look at a favorite planet to a journey through spaceflight history, OptiUniverse makes space something you can explore.

Twinkleton is a gentle, beautiful astronomy playground for curious explorers (ages 5–10). Spin a real 3D solar system in your hands, sit back for a movie-like flight past every planet, and discover how space works through playful, hands-on lessons — all guided by Luma, a friendly little astronaut. EXPLORE IN 3D • A real-texture Sun, eight planets, Pluto, the Moon, Saturn's rings and the Milky Way • Drag to orbit, pinch to zoom — like holding the solar system in your hands • Tap any planet to fly to it and open a friendly fact card • Slow it down, speed it up, or rewind time to watch the planets dance A MOVIE OF THE SOLAR SYSTEM • Immersive mode plays a calm, cinematic fly-through — drifting in from far away, then visiting each planet up close with gentle music LEARN BY DOING Ten interactive lessons turn big ideas into simple play: • Why we always see the same face of the Moon • Why you float with a tiny jump on the Moon (1/6 gravity) • How far the Sun is — light takes 8 minutes to reach us • How many Moons fit inside the Earth • Which planet is hottest (surprise — it's not the closest one!) • How much you'd weigh on every planet • What a satellite is — natural vs. man-made • How long a day lasts on other worlds • Solar and lunar eclipses, seen from space AND from Earth • A deck of cosmic fun-facts SAFE, GENTLE & AD-FREE • Fully bilingual — English and 繁體中文, switch anytime • Friendly voice narration reads every fact aloud • No ads, no links out, and no sign-up — privacy-first, anonymous analytics only • Works on iPhone and iPad Distances and sizes are scaled down so everything stays fun and visible — a toy model of the real thing, built to spark wonder.