Solar Activity vs Solar System
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solar Activity
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.
- Magnetic storm forecast
- Kp index forecast (3-27 days)
- Aurora borealis predictions
- Sunspot tracking
- Solar wind monitoring
- Latest SOHO/SDO images & videos
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Monitor solar activity. Get a solar storm forecast for the next 3-27 days and view the latest images and videos from SOHO/SDO. Also includes: - magnetic storm forecast - Kp index forecast for 3/27 days - aurora borealis - sunspots - solar wind
Solar System
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.
- Detailed planetary information
- Distance from Earth
- Density and size data
- Zoomable planet views
- Solar system exploration
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Explore the Solar System in 3D — planet by planet. Solar System turns your phone into an interactive model of our cosmic neighborhood. Rotate, zoom and tap your way through every planet, moon and the Sun, with real astronomical data for each one: distance from Earth, orbital period, size, density and more. Explore all 8 planets, the Sun, Pluto and the Moon in interactive 3D Zoom in to reveal surface detail and true-to-scale size Discover Mars' and Jupiter's largest moons See Earth's day and night side update in real time Fully bilingual: English and Spanish Perfect for students, space enthusiasts, and anyone curious about what's really out there.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Solar Activity | Solar System |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 3.7 (3 ratings) — better |
| Positive reviews | 25.0% of reviews | — |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 3 months | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 33 MB | 127 MB |
| Age rating | 4+ | +4 |
| Developer | Pavel Koyushev | Francesc Navarro Machio |
Customer experience
Solar Activity
Solar System
In-app purchases
Solar Activity
No in-app purchases
Solar System
No in-app purchases
Questions
Is Solar Activity free?
Is Solar System free?
Which has better reviews, Solar Activity or Solar System?
Do Solar Activity or Solar System have ads?
Which is updated more often, Solar Activity or Solar System?
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