RRA(SWTIS) vs Solar Activity
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RRA(SWTIS)
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.
- Real-time space weather monitoring
- 3-day space weather forecast
- Forecasting models and observation data
- Space weather effects analysis
- Space weather news and announcements
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What is the Solar flare? What's going on around the Sun and the Earth ? So, the KSWC finally developed this space weather mobile APP. It is expected that this APP is a portal site of the space weather, and provides the observation data, forecasting models and SWx monitors in real time. The KSWC was formally established as such in 2011, and 14th member of ISES(International Space Environment Service). The KSWC has dreamed of "the safety Korea without space weather disaster" by accurate forecasts and prompt alerts. The main features 1. Space weather now 2. 3-day forecast of space weather 3. forecasting models and observation data 4. Space weather effects(Aviation, satellites, GNSS, Power Grids, Communications) 5. NEWS and announcement of of KSWC The KSWC(Korea Space Weather Center) of RRA(Radio Research Agency) http://www.spaceweather.kasa.go.kr E-mail spaceweather@korea.kr
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
Screenshots
Verdict
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.
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.
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.
| Parameter | RRA(SWTIS) | Solar Activity |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 85.7% of reviews — better | 25.0% of reviews |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 20 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | 국립전파연구원 | Pavel Koyushev |
Customer experience
RRA(SWTIS)
Solar Activity
In-app purchases
RRA(SWTIS)
No in-app purchases
Solar Activity
No in-app purchases
Questions
Is RRA(SWTIS) free?
Is Solar Activity free?
Which has better reviews, RRA(SWTIS) or Solar Activity?
Do RRA(SWTIS) or Solar Activity have ads?
Which is updated more often, RRA(SWTIS) or Solar Activity?
Other comparisons
