Horizon vs Pie Matrix

Hold up your phone and watch the night sky come alive. Horizon-AR uses your camera, GPS, and device motion to place real-time augmented reality overlays exactly where celestial objects appear in the sky above you. TRACK THE SOLAR SYSTEM Follow the Moon, Sun, Mercury, Venus, Mars, Jupiter, and Saturn with a live arc overlay showing each object's full path across the sky tonight. Rise and set times update in real time based on your precise location. 110 MESSIER DEEP-SKY OBJECTS IN AR Activate Hot Targets mode and see every Messier object currently above your horizon floating in the AR view — galaxies, nebulae, open clusters, and globular clusters, each colour-coded by type. Tap any label to open a detail card showing: • Object type and Messier catalogue number • Common name (Andromeda Galaxy, Orion Nebula, Pleiades…) • Current altitude above the horizon • Apparent visual magnitude • Recommended instrument — naked eye, binoculars, or telescope • Favourite toggle, saved across sessions When objects cluster together, a single tap fans them out radially so you can reach each one individually. FILTER BY OBJECT TYPE Narrow the Hot Targets overlay to just galaxies, just nebulae, or just star clusters with a single tap. Objects you've starred appear in your Nightly Overview for quick access every session. FREEZE THE SKY Long-press anywhere to lock the entire AR view — overlays and camera image — as a still frame. Perfect for star parties, sketching, or sharing a screenshot. Tap once to unfreeze. NIGHTLY OVERVIEW Open the Tonight sheet for a full list of rise, transit, and set times for all solar system objects plus your Messier favourites, sorted for the coming night at your location. WORKS WITHOUT FULL PERMISSIONS No camera access? Horizon-AR switches to a star-field background with altitude rings and an azimuth grid so you can still explore the sky. Declined location? Enter coordinates manually and continue without interruption. No account. No subscription. No ads. Privacy: your location and camera data never leave your device.

Pie Matrix turns your iPhone into a real-time window to the cosmos. Point your phone at the sky and instantly see what's above you — stars, planets, constellations, the Moon, deep sky objects, and even the ISS flying overhead. AUGMENTED REALITY SKY VIEW Hold your phone up and the sky map aligns perfectly with what's above you using your device sensors. See 190,000+ stars rendered in real-time with accurate positions, colors, and brightness. Watch constellations come alive with artwork overlays. WHAT'S VISIBLE TONIGHT Every evening, Pie Matrix computes what's visible from your exact location — bright planets, the Moon's phase, Messier objects, meteor showers, and satellite passes. No guesswork, just look up. SEARCH & FIND ANY OBJECT Looking for Saturn? The Andromeda Galaxy? Type its name and a guided reticle points you right to it. The circle shrinks as you get closer — satisfying every time. MY TELESCOPE Select your telescope from our catalog and get personalized observing targets based on your equipment's capabilities. Know your magnification, field of view, and faintest star visible — then find objects matched to your setup. SKY CALENDAR Plan ahead with celestial events — conjunctions, eclipses, meteor shower peaks, planet oppositions. Never miss a good night. FEATURES • 190,000+ stars with real-time positions • All 88 constellations with line art and boundaries • Planets with moons (Jupiter's Galilean moons, Titan) • 110 Messier deep sky objects (galaxies, nebulae, clusters) • ISS and satellite tracking • Milky Way overlay • Moon phases and illumination • Time travel — see the sky at any date/time • Red night mode to preserve dark adaptation • Adjustable Bortle scale for light pollution • Manual mode for use without sensors • Ground/horizon with customizable landscapes • Wikipedia info for every object you tap • Push notifications for nightly sky highlights • Works offline after initial setup SHOP Browse telescopes, binoculars, and accessories from The Sky Circle — India's astronomy gear destination. Find your next scope right in the app. Built with love for the night sky by Pie Matrix.