# ISS Online vs Solar System Viewer

The clearest difference is in-app purchases: ISS Online at none against Solar System Viewer's 4. ISS Online also leads on price ($1.99 vs $2.99) and iOS requirement (16.0 vs 26.0). Solar System Viewer's advantage is review sentiment (83% vs 50%) and device support (4 vs 2). On update cadence, ads and monetization model there is nothing between them.

ISS Online costs $1.99 and Solar System Viewer $2.99 up front. Solar System Viewer sells 4 one-off in-app purchases. ISS Online asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | ISS Online | Solar System Viewer |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | — | **[4.4 (28 ratings)](https://appshunter.io/ios/app/solar-system-viewer-8planets/id1554639445/reviews)** |
| Number of ratings | — | **28** |
| Positive reviews | 50.0% of reviews | **83.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Paid | Paid |
| Size | 7 MB | 22 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Pavel Koyushev](https://appshunter.io/developer/1257728721) | [BLUE COMET LABS LLC](https://appshunter.io/developer/1492055170) |

## What reviewers say

### ISS Online

[App page](https://appshunter.io/ios/app/iss-online/id1434652920)

Explore life aboard the International Space Station with live HD video streams of Earth. Track the station's position, view crew information, and take a virtual tour. Stay updated on ISS activities and its Twitter feed.

**Highlights:** Live HD camera stream, ISS location tracking, Crew member information, Virtual station tour, Official ISS Twitter feed

**Features:** macOS Compatibility

**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 Online free?

ISS Online costs $1.99, with no in-app purchases.

### Is Solar System Viewer free?

Solar System Viewer costs $2.99, and also offers in-app purchases.

### Do ISS Online or Solar System Viewer have ads?

Neither ISS Online nor Solar System Viewer shows ads.

### Which is updated more often, ISS Online or Solar System Viewer?

ISS Online ships an update every 2 months, and Solar System Viewer every 2 months. Most recently, ISS Online was updated on November 2, 2026 and Solar System Viewer on November 3, 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.*