SkyQI vs Sky Clock

SkyQI turns your smartphone into a sky quality meter. Upload a photo of the night sky and our algorithm instantly analyzes it — detecting stars, measuring artificial light contamination, and calculating your sky's Bortle class and SQM value. FEATURES • Instant Analysis — Upload a night sky photo and get your Bortle scale (1-9) and SQM reading in seconds • Light Pollution Map — Explore an interactive map with NASA VIIRS satellite data overlay showing light pollution across India • Sky Conditions Forecast — Check cloud cover, seeing, and transparency before heading out to stargaze • Photo Gallery — Browse night sky photos from citizen scientists across the country • Learn — Read articles about light pollution, dark sky destinations, astrophotography tips, and more • Track Progress — View your measurement history and personal statistics WHO IS IT FOR? • Amateur astronomers planning observation sessions • Students and teachers doing citizen science projects • Anyone curious about the quality of their night sky • Environmental advocates tracking light pollution trends SkyQI is a citizen science project started by Suhani Gupta in Gurgaon. Every measurement you upload contributes to building India's most detailed light pollution database. Free to use. No account required to upload.

Never miss what's above you. Sky Clock answers one question: what's worth stepping outside for, from exactly where you're standing? It picks tonight's best sight, plans your week of sky (Space Station passes, planets, the Moon, sky pairings, meteor shower peaks), and points your phone straight at it. No giant star catalog to dig through. No account, no sign-up. WHAT SKY CLOCK DOES - Tells you about everything worth seeing, without asking: the Space Station, China's space station, Starlink trains, planets at their best, sky pairings and meteor shower peaks. It taps your wrist 10 minutes before the Station flies over. - Only when it's clear: every alert comes with a clear-sky verdict, and on a clear evening you'll hear about it that afternoon. - Shows you where to look: which planets are up right now, and your phone to find them. - A beautiful interactive map of every star you can actually see, drawn for the light you really have. - A plan for your week: the best things to see, and when, with the best night picked for you. - The aurora: know the nights it could reach you. - Tonight's plan, dusk to dawn, and time travel to any moment in the sky. - Photo tips for every sighting, made for your iPhone. - A Sky Passport of everything you've seen, synced privately through your own iCloud account. - Share Plus with up to 6 people in your family. BUILT FOR YOUR BACKYARD Everything is computed for your exact location and works offline. No ads, no account, no clutter. Just you, the sky, and a straight answer. Whether you're wondering "what's that bright thing?" or you never want to miss a meteor shower again, Sky Clock is the sky companion that meets you right where you're standing. Look up. We'll tell you when. SKY CLOCK PLUS Most of Sky Clock needs Sky Clock Plus. - Sky Clock Plus, Yearly: $44.99 per year, with a 14-day free trial. - Sky Clock Plus, Monthly: $6.99 per month. - Sky Clock Plus Forever: $89.99, a one-time purchase. - Plus can be shared with up to six family members through Family Sharing. - Subscriptions are charged to your Apple Account at confirmation of purchase and renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel any time in your Apple Account settings. - Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ - Privacy Policy: https://www.skyclockapp.com/privacy