Comparison

ISS Track 2 vs Solar System Viewer

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

Head to head
About

ISS Track 2

Track the International Space Station's live position on an interactive map or 3D globe. Discover when it will be visible from your location and watch live webcam streams from orbit.

Highlights
  • Live ISS position on interactive map/globe
  • Visibility predictions for naked-eye viewing
  • Live webcam stream from the ISS
  • Precise orbital data updated every 3 seconds
  • Multiple map/3D globe views
  • Customizable units and formats
Features
Read full description

ISS Track allows to see the position of the the International Space Station over an interactive map of the world or an interactive tridimensional representation of the globe. You will be able to know if the International Space station will be visible (naked eye) from your local position in the next hours and find it when over you. EASY TO USE Launching the app you can immediately see the position of the International Space Station over a map of the globe and see if it's near you inside the visible circle Knowing the position you can see it at naked eyes when it's over you at the right time of the day With a simple touch you can also see the live webcam stream coming from the International Space Station. You will watch the astronauts activities with video and audio, all live. FUN AND PRECISE ISS-Track is fun and precise at the same time. Calculation of the position of the station is very accurate, the app uses the latest NASA code optimized for iOS to calculate it. You don't get an approximated position, you get the EXACT position, speed and altitude of the Station updated any 3 second. The route path is visualized over the map to evaluate if the station is coming near your position in the next hours (when meteorological and light condition are adequate you can see it without any instruments, just observing the sky naked-eye). Time of day matters, you can't see it during the day but only when you have dark sky and the station still get the sun light, so usually after sunset for around 3 hours and before dawn (for a period of 3 hours) You have the possibility to see it many times in a month and many nights you have 2 valid passages in around 90 minutes(the time it spends for a world complete orbit at 27 000 Km/h - 17 000 MPH) After some time you will become expert to spot it in the sky as soon as it is on the horizon. FEATURES • Easy to use • Perfect results as using pro orbital software but in an easy to use app • Offers 6 different kind of map/3D globe • Customizable latitude/longitude format • Measure units in Km and Km/h or NM and MPH • Zoomable movable interactive Map and 3DGlobe showing also night/day areas • 'Keep Centered' function • Circle area of visibility moving with the station • Autodetect of your position and circle area of visibility around your position • Autoupdate of the NASA orbital parameters for an always perfect precise position calculation • macOS release available. Search on Mac App Store for 'International Space Station 2'

About

Solar System Viewer

Explore and simulate the orbits of planets in our solar system. This app allows you to speed up or slow down time, travel to any date, and view planetary positions. It also offers widgets for your home screen and Apple Watch complications.

Highlights
  • Simulate planetary orbits
  • Adjust time speed
  • Time travel to specific dates
  • Home screen widgets
  • Apple Watch integration
  • View planet overviews
Features
Read full description

8Planets is a simple viewer and simulator for planetary orbits in our Solar System. 8Planets helps you discover how the planets aligned and move around over time so that you feel the scale of the Solar System or even the Universe. By giving you quick and easy access to the Solar System everywhere, 8Planets will make you feel that the Solar System is close to us. FEATURES ・Planetary Motion Speed up or slow down time to see how the planets rotate over time and grasp the scale of the Solar System. ・Time Travel Travel back or forward in time to view the Solar System or planetary positions on any given date. ・Widgets Widgets allow you to display the real-time Solar System on your Home Screen. ・Watch View the Solar System on your wrist and use Digital Crown to travel back or forward in time. ・Others Apple Watch Complications, Overview of the planets, Option to show Pluto, Sharing your favorite moment of the Solar System, URL Scheme, and more.

Screenshots

ISS Track 24 screens
Solar System Viewer3 screens

Verdict

The call

The clearest difference is review sentiment: Solar System Viewer at 83% against ISS Track 2's 0%. Solar System Viewer also leads on rating (4.4 vs 1.0) and update cadence (every 2 months vs every 22 months). ISS Track 2's advantage is in-app purchases (none vs 4) and iOS requirement (12.0 vs 26.0). On ads, monetization model 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

ISS Track 2 costs $4.99 and Solar System Viewer $2.99 up front. Solar System Viewer sells 4 one-off in-app purchases. ISS Track 2 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Solar System Viewer holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: Solar System Viewer has 28 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of ISS Track 2's written reviews are positive against 83% of Solar System Viewer's.

UpkeepUpdate frequency

ISS Track 2 ships an update every 22 months, Solar System Viewer every 2 months. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

Scorecard7 real differences · 3 level
ISS Track 2 versus Solar System Viewer: the parameters behind the verdict, then further details
ParameterISS Track 2Solar System Viewer
Price$4.99$2.99 — better
Rating1.0 (1 ratings)4.4 (28 ratings) — better
Positive reviews0.0% of reviews83.3% of reviews — better
Number of ratings128 — better
Update frequencyEvery 22 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, Mac, Apple Watch — better
Requires iOS12.0 — better26.0
Further details — not scored
Size2 MB22 MB
Age rating4+4+
DeveloperRoberto PanettaBLUE COMET LABS LLC

Customer experience

ISS Track 2

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Solar System Viewer

All ratings28 ratings
Positive85.7%
Neutral3.6%
Negative10.7%
Written reviews6 reviews
Positive83.3%
Neutral16.7%
Negative0.0%

In-app purchases

None

ISS Track 2

No in-app purchases

4 purchases

Solar System Viewer

One-time4
  • Io Tip$1.99
  • Europa Tip$3.99
  • Ganymede Tip$5.99
Show 1 more
  • Callisto Tip$9.99

Questions

Is ISS Track 2 free?
ISS Track 2 costs $4.99, with no in-app purchases.
Is Solar System Viewer free?
Solar System Viewer costs $2.99, and also offers in-app purchases.
Which has better reviews, ISS Track 2 or Solar System Viewer?
Solar System Viewer is rated higher. ISS Track 2 averages 1.0 out of 5 from 1 ratings, while Solar System Viewer averages 4.4 from 28 ratings.
Do ISS Track 2 or Solar System Viewer have ads?
Neither ISS Track 2 nor Solar System Viewer shows ads.
Which is updated more often, ISS Track 2 or Solar System Viewer?
ISS Track 2 ships an update every 22 months, and Solar System Viewer every 2 months. Most recently, ISS Track 2 was updated on November 2, 2026 and Solar System Viewer on November 7, 2026.

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