Comparison

Zenith vs Satellite Tracker / Radar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Zenith

Explore Earth in a 3D simulation and track the International Space Station's real-time orbit. Experience a rotating planet with dynamic soundscapes and see the current number of astronauts on board.

Highlights
  • 3D Earth simulation
  • Real-time ISS orbit tracking
  • Live astronaut count
  • Dynamic soundscapes
  • Earth rotation view
Features
Read full description

Zenith shows the International Space Station live on a 3D globe, and tells you when to see it with your own eyes. • Live position, altitude, speed, day or night — updated every 5 seconds • The camera follows the station; spin the Earth with a finger • Upcoming visible passes over you: time, direction, height • A free alert before the best pass of the week • The crew on board: photos, agencies, days in orbit • Ambient space soundscape ZENITH+ • An alert before every visible pass • Full 10-day forecast • Choose your alert time: 2, 5, 10 or 15 minutes • Predicted orbit on the globe Zenith+ is available as a monthly or yearly subscription (7-day free trial on yearly), or as a one-time lifetime purchase. Payment is charged to your Apple Account. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period; manage them in Settings › Apple ID › Subscriptions. Your location stays on your iPhone. No ads. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Satellite Tracker / Radar

Explore the night sky with this AR-powered guide. Identify satellites like the ISS and Starlink, constellations, and stars by pointing your phone at the sky. Get real-time tracking, pass predictions, and notifications for visible celestial events.

Highlights
  • AR Sky Guide
  • Satellite tracking (ISS, Starlink)
  • Constellation and star identification
  • Live sky radar and 3D globe
  • Pass predictions and notifications
  • Offline mode
  • Large satellite database
Features
Read full description

Turn your phone into the ultimate AR Sky Guide. Identify lights in the night sky instantly. Whether tracking the International Space Station (ISS), watching a Starlink train, or identifying Constellations, Satellite Tracker provides professional-grade data with a stunning interface. NEW: AR STARGAZING MODE Stop guessing where to look. We've expanded our Augmented Reality view to include the stars! Identify Stars & Constellations: Align your phone to see constellation lines and star names drawn over the real sky. Satellite AR: Spot the ISS, Hubble, and thousands of satellites with precise zenith alignment. Unified View: See how satellites move through the constellations in real-time. NEW: AUGMENTED REALITY (AR) MODE Stop guessing where to look. Activate the AR Sky View and point your camera at the sky. The app overlays the exact position of satellites, the ISS, and celestial objects directly on your screen. Align the zenith arrow and spot objects in seconds. CORE FEATURES: Live Sky Radar & 3D Globe Visualize Earth and its orbiters like never before. Switch between a 2D Radar Scope for polar plotting or a stunning 3D Interactive Globe to see satellite trajectories relative to the Earth's day/night line. ISS & Starlink Tracker Get precise Pass Predictions. We calculate flyovers specifically for your location using the latest SGP4 propagation data. ISS Spotter: Know exactly when the Space Station will rise and set. Starlink Trains: Track the famous "string of pearls" satellite constellations. Notify Me: Set alerts for the next 2 hours or next 6 hours so you never miss a visible pass. Massive Database (NORAD/TLE) Access a catalog of over 12,000+ objects. From active weather satellites to space junk and classified bodies. Search: Find objects by Common Name or NORAD ID. Classify: Color-coded filters for LEO, MEO, GEO, and HEO orbits. Live Telemetry: View real-time altitude, velocity, range, and doppler shift. Power User Tools Offline Mode: Heading to a dark-sky preserve? Predictions work without internet access. Device Optimization: Adjustable "Satellite Limit" to ensure smooth performance on any device. Download Satellite Tracker today and join the community of sky-watchers. Never ask "What was that light?" again.

Screenshots

Zenith4 screens
Satellite Tracker / Radar4 screens

Verdict

The call

The clearest difference is ads: Zenith at none against Satellite Tracker / Radar's shown. Zenith also leads on rating (4.8 vs 4.4) and monetization model (free vs ad-supported). Satellite Tracker / Radar's advantage is update cadence (weekly vs every 13 months) and ratings volume (34 vs 5). On price, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Zenith holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Satellite Tracker / Radar has 34 ratings behind it against 5, so its average is the more settled of the two.

UpkeepUpdate frequency

Zenith ships an update every 13 months, Satellite Tracker / Radar weekly. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

Scorecard6 real differences · 4 level
Zenith versus Satellite Tracker / Radar: the parameters behind the verdict, then further details
ParameterZenithSatellite Tracker / Radar
PriceFreeFree
Rating4.8 (5 ratings) — better4.4 (34 ratings)
Positive reviews—50.0% of reviews
Number of ratings534 — better
Update frequencyEvery 13 monthsWeekly — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.6 — better
Further details — not scored
Size7 MB66 MB
Age rating4+4+
DeveloperAurelien GrifasiMICHAL DOMINIK GIZA

In-app purchases

None

Zenith

No in-app purchases

None

Satellite Tracker / Radar

No in-app purchases

Questions

Is Zenith free?
Zenith is free to download, with no in-app purchases.
Is Satellite Tracker / Radar free?
Satellite Tracker / Radar is free to download, with no in-app purchases.
Which has better reviews, Zenith or Satellite Tracker / Radar?
Zenith is rated higher. Zenith averages 4.8 out of 5 from 5 ratings, while Satellite Tracker / Radar averages 4.4 from 34 ratings.
Do Zenith or Satellite Tracker / Radar have ads?
Satellite Tracker / Radar shows ads; Zenith does not.
Which is updated more often, Zenith or Satellite Tracker / Radar?
Zenith ships an update every 13 months, and Satellite Tracker / Radar weekly. Most recently, Zenith was updated on November 4, 2026 and Satellite Tracker / Radar on November 5, 2026.

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