Scan the Sky vs FredSky

Scan the Sky is your ultimate live cosmic tracking and orbital discovery tool. Whether you are a casual stargazer or an avid astronomer, our real-time atmospheric and celestial data ensures you never miss a moment under the stars. Key Features: -Light Pollution Scouting Map: Tap anywhere on our interactive map to calculate regional skyglow degradation. Find the perfect Class 1 pristine dark sky site with our Bortle scale indicator. -Meteor Shower Index: Get real-time radiant tracking and peak activity alerts for major cosmic streams, from the Perseids to the Geminids. -ISS Live Tracking: Our orbital matrix tells you exactly when the International Space Station is flying overhead, including altitude, speed, and visibility flags. -Seasonal Constellation Guide: Beautiful vector mapping and historical lore for constellations tailored exactly to your GPS coordinates and the current season. -Space Weather Matrix: Live NOAA data streams alert you to active solar storms and geomagnetic Kp-index spikes so you can chase the aurora. -Live Cloud Cover & Lunar Projections: Open-Meteo forecasts combined with exact moon phase calculations ensure you only head out when the canopy is crystal clear.

FredSky turns your iPhone into a pocket planetarium. Look up, then at your phone, and instantly see what's overhead right now — the stars and constellations, the Moon and planets, and satellites passing over. The all-sky chart is centered on the zenith, like lying back and looking straight up, drawn for your exact location and moment. Raise your phone toward the sky and FredSky switches to a live camera view with the brightest objects labeled where you're aiming. Lower it, and you're back to the chart. • Live star chart — stars to naked-eye brightness, the classic constellation figures, the planets, the Moon at its true phase, and visible satellite passes. • Fully offline — the entire star catalog is built in, so the sky is right whether or not you have a signal. • Point-and-look — hold your phone up to identify the bright star or planet you're looking at. • Bird songs, too — tap record and FredSky identifies the bird singing nearby, then keeps your sightings as an illustrated life list. • Red night mode — a one-tap, dark-adapted view that protects your night vision outdoors. No account. No ads. No tracking. Just look up. Positions, phases, and pass times are computed properly — the numbers stay serious, even though the whole app is built to answer one question fast: what is that?