Cosmotrak - Satellite Tracker

Know when to look up. Find visible ISS passes, get reminders, explore planets in 3D, and see the published math behind Cosmotrak's predictions.

Know when to look up. Track the ISS and other satellites, plan visible passes from your location, and explore the solar system in 3D.

Cosmotrak brings satellite tracking, pass reminders, an AR finder, and space exploration together on your iPhone. Follow what interests you, find your next viewing opportunity, and keep the sky close throughout your day.

PLAN YOUR NEXT PASS

• See when a satellite rises, reaches its highest point, and sets.
• Check direction, elevation, range, and predicted visibility before heading outside.
• Find ranked viewing opportunities in Tonight and check local weather.
• Set a pass reminder or add a pass to Calendar.
• Use your current location or choose an observing location manually.

FOLLOW SATELLITES AROUND EARTH

• Watch the ISS and thousands of cataloged satellites move around a detailed 3D globe.
• Search by name or NORAD ID, browse categories, and build your tracking list.
• Follow satellite ground tracks on a 2D map.
• Pause, rewind, or fast-forward with Time Machine to explore predicted paths.

FIND YOUR TARGET IN AR Select a satellite and use the AR Satellite Finder to see where to point your iPhone. Direction and elevation guidance help you locate your target, with clear status when it is below the horizon. AR requires a compatible iPhone running iOS 18 or later.

EXPLORE BEYOND EARTH Travel through an interactive solar system with detailed planets, moons, and spacecraft. Explore Saturn's rings, learn about celestial bodies, and move through time to see their positions change. Browse rocket launch schedules, save upcoming missions, and read spaceflight news.

KEEP YOUR NEXT PASS CLOSE See upcoming passes in widgets and Live Activities. Keep an observation journal with notes, photos, tags, and saved observing sites, then export a backup of your journal.

EXPLORE THE MATH Cosmotrak publishes its numerical validation results. The 1.6 mathematical validation suite passed 44,617 checks covering satellite propagation, coordinate calculations, pass prediction, and planetary positions. Explore reference comparisons and published results in the app's Validation screen or at https://cosmotrak.com/validation.

START FREE. GO FURTHER WITH PRO. Track up to three individual satellites or one category, set one pass alert, and keep up to 20 journal entries for free. Cosmotrak Pro adds unlimited satellite tracking and pass alerts, automatic alert rules, the full Tonight list, extended Time Machine controls, advanced weather tools, and unlimited new journal entries.

Download Cosmotrak and plan your next look at the sky.

An internet connection is needed to download and refresh orbital data. Predictions use the available data; keep it updated for the best results. Camera access is requested when you open the AR finder.

Payment is charged to your Apple Account when a purchase is confirmed. Subscriptions renew automatically unless canceled at least 24 hours before the current period ends. Manage or cancel subscriptions in your App Store account settings. Prices and subscription periods are shown before purchase.

Privacy Policy: https://cosmotrak.com/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/