# RRA(SWTIS) vs Solar Activity

The clearest difference is review sentiment: RRA(SWTIS) at 86% against Solar Activity's 25%. RRA(SWTIS) also leads on rating (5.0 vs 1.0) and ads (none vs shown). On price, update cadence, in-app purchases and device support there is nothing between them.

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

RRA(SWTIS) holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: RRA(SWTIS) has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 86% of RRA(SWTIS)'s written reviews are positive against 25% of Solar Activity's.

RRA(SWTIS) ships an update every 4 months, Solar Activity every 3 months. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | RRA(SWTIS) | Solar Activity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/rraswtis/id647086467/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/solar-activity/id1460144397/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | **85.7% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | **Free** | Ad-supported |
| Size | 20 MB | 33 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [국립전파연구원](https://appshunter.io/developer/647086470) | [Pavel Koyushev](https://appshunter.io/developer/1257728721) |

## What reviewers say

### RRA(SWTIS)

[App page](https://appshunter.io/ios/app/rraswtis/id647086467)

This app provides real-time space weather data, forecasts, and alerts. It monitors solar activity and its potential effects on Earth, including impacts on aviation, satellites, and power grids.

**Highlights:** Real-time space weather monitoring, 3-day space weather forecast, Forecasting models and observation data, Space weather effects analysis, Space weather news and announcements

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is RRA(SWTIS) free?

RRA(SWTIS) is free to download, with no in-app purchases.

### Is Solar Activity free?

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

### Which has better reviews, RRA(SWTIS) or Solar Activity?

RRA(SWTIS) is rated higher. RRA(SWTIS) averages 5.0 out of 5 from 5 ratings, while Solar Activity averages 1.0 from 1 ratings.

### Do RRA(SWTIS) or Solar Activity have ads?

Solar Activity shows ads; RRA(SWTIS) does not.

### Which is updated more often, RRA(SWTIS) or Solar Activity?

RRA(SWTIS) ships an update every 4 months, and Solar Activity every 3 months. Most recently, RRA(SWTIS) was updated on September 22, 2026 and Solar Activity on September 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.*