# Solar Activity vs Solar System

The clearest difference is rating: Solar System at 3.7 against Solar Activity's 1.0. Solar System also leads on ads (none vs shown) and update cadence (weekly vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Solar System holds the better App Store score, 3.7 against 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Solar Activity ships an update every 3 months, Solar System weekly. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Solar Activity | Solar System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/solar-activity/id1460144397/reviews) | **[3.7 (3 ratings)](https://appshunter.io/ios/app/solar-system-planet-guide/id1536272859/reviews)** |
| Number of ratings | 1 | **3** |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Ad-supported | **Free** |
| Size | 33 MB | 127 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [Pavel Koyushev](https://appshunter.io/developer/1257728721) | [Francesc Navarro Machio](https://appshunter.io/developer/488794379) |

## What reviewers say

### Solar Activity

[App page](https://appshunter.io/ios/app/solar-activity/id1460144397)

Track solar activity with a forecast for magnetic storms up to 27 days in advance. View the latest images and videos of the sun, and monitor key metrics like the Kp index and sunspots.

**Highlights:** Magnetic storm forecast, Kp index forecast (3-27 days), Aurora borealis predictions, Sunspot tracking, Solar wind monitoring, Latest SOHO/SDO images & videos

**Features:** macOS Compatibility

**In-app purchases:** none


### Solar System

[App page](https://appshunter.io/ios/app/solar-system-planet-guide/id1536272859)

Explore our solar system with detailed information on each planet. Discover their distance from Earth, density, and size. Zoom in to view intricate details of celestial bodies.

**Highlights:** Detailed planetary information, Distance from Earth, Density and size data, Zoomable planet views, Solar system exploration

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Solar Activity free?

Solar Activity is free to download, with no in-app purchases.

### Is Solar System free?

Solar System is free to download, with no in-app purchases.

### Which has better reviews, Solar Activity or Solar System?

Solar System is rated higher. Solar Activity averages 1.0 out of 5 from 1 ratings, while Solar System averages 3.7 from 3 ratings.

### Do Solar Activity or Solar System have ads?

Solar Activity shows ads; Solar System does not.

### Which is updated more often, Solar Activity or Solar System?

Solar Activity ships an update every 3 months, and Solar System weekly. Most recently, Solar Activity was updated on October 13, 2026 and Solar System on October 10, 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.*