# ISS Track 2 vs Solar System Viewer

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.

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.

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.

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.

## The numbers

| Metric | ISS Track 2 | Solar System Viewer |
| --- | --- | --- |
| Price | $4.99 | **$2.99** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/iss-track-2/id1406132231/reviews) | **[4.4 (28 ratings)](https://appshunter.io/ios/app/solar-system-viewer-8planets/id1554639445/reviews)** |
| Number of ratings | 1 | **28** |
| Positive reviews | 0.0% of reviews | **83.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 2 MB | 22 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Roberto Panetta](https://appshunter.io/developer/1438480110) | [BLUE COMET LABS LLC](https://appshunter.io/developer/1492055170) |

## What reviewers say

### ISS Track 2

[App page](https://appshunter.io/ios/app/iss-track-2/id1406132231)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Solar System Viewer

[App page](https://appshunter.io/ios/app/solar-system-viewer-8planets/id1554639445)

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:** Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Io Tip | $1.99 | one-time |
| Europa Tip | $3.99 | one-time |
| Ganymede Tip | $5.99 | one-time |
| Callisto Tip | $9.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*