Sky Claim: Star Hunt & Sky Map

Sky Claim is a stargazing app and a night sky game. Point your phone at a real star, planet or the Moon, hold it steady, and claim that object into your permanent personal collection.

It is a star map you play, not a star map you read. The entire sky is computed on your device, so it works with no internet at all.

HOW A CLAIM WORKS
Open Hunt mode and aim at the sky. Your phone's compass and motion sensors confirm you are pointed within a few degrees of the object's true position, and you hold that aim for a moment to lock it in. There is no tap to claim shortcut. Every claim is saved with the date, time and place, and is yours permanently.

Cloudy night, or a bright city sky? You are aiming at a real object's true computed position, so a claim still works from a balcony, a window, or indoors. No dark sky and no telescope required.

VOYAGES: TRAVEL TO A STAR YOU HAVE CLAIMED
Launch a probe at any star in your collection. It crosses one light year every real hour, so Proxima takes four hours and Betelgeuse takes three weeks. Check in as it flies to see which real stars it has overtaken.

When it lands, the sky map shows the genuine night sky from that star, built from real measured distances. Familiar stars sit in unfamiliar places. Some vanish. And our own Sun becomes an ordinary point of light you have to go looking for.

STAR GAZING: THE WHOLE SKY
- A full 360 degree sky map, covering everything above and below the horizon
- All 5,070 stars, the Sun, the Moon at its true phase, and the planets out to Pluto
- Real IAU constellation figures. Tap any object for its details
- Textured planets: zoom in for Jupiter's bands, Saturn's rings, and genuine crescent phases on Venus
- Time travel: scrub forward or back and watch the sky turn
- Replay a claim, and the sky snaps to the exact night you made it

WHAT YOU CAN CLAIM
- The Moon, with real moon phase tracking, and the naked eye planets
- Hundreds of real named stars with true spectral type, magnitude and distance
- Messier deep sky objects: real nebulae, galaxies and star clusters
- Legendary events: meteor showers, claimable while they peak

YOUR COLLECTION
- Sky Log: flippable cards carrying real astrophysics and lore for every object
- Constellation Album: seal official IAU constellations as you complete them
- Moon Log: 28 tiles keyed to the Moon's real phase, not the calendar. Add your own photos
- Wanderer Log: a page per planet, plotting your catches on its real size cycle
- Nightly streaks, 12 ranks, and dozens of achievements
- Export your whole observation log to CSV, for a school report or your own records

NIGHT LAMP
Leave tonight's real sky glowing on your nightstand, in a deep red that protects your night vision, drifting as the sky truly turns.

PLAYGROUND: REAL PHYSICS, TURNED INTO GAMES
Waiting for dusk? Seventeen experiences built from real published astronomy:
- Star Fight and Star Duel: your claimed stars battle on real luminosity, mass and temperature
- Stability Sandbox: build a solar system and see whether it survives real orbital mechanics
- Outbound: fly to Proxima Centauri or Andromeda, and watch real time dilation pull the clocks apart
- Singularity Accretion: throw a star into a black hole and let real tidal physics decide its fate
- Roche Limit Shatter, Solar Sail Navigation, Orbital Slingshot, Pulsar Calibration, Chandrasekhar Tester
- Celestial Quiz and Celestial Trivia: hundreds of real astronomy questions and facts
- Star Search: look up any star in the catalog and read its real data

WHAT IT DOES, AND WHAT IT DOES NOT
Sky Claim records that you aimed at an object's real position, at a real time and place. It cannot tell whether the sky was clear or whether you actually saw anything. It is a stargazing app, not a full planetarium.

PRIVACY
No accounts. No sign up. No servers. Nothing you record ever leaves your phone.

Sky Claim is free to download, and an optional one time upgrade is available inside the app. There is no subscription.