RRA(SWTIS) vs ARMAS
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
ARMAS
Real-time radiation monitoring for aviation and space weather awareness. Pairs with hardware detectors or provides data from global systems for pilots and travelers.
- Real-time radiation monitoring
- Space weather awareness
- Pairs with ARMAS Flight Modules
- Detects various radiation types
- Global airspace coverage
- Data from ground and space systems
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The Automated Radiation Measurements for Aerospace Safety (ARMAS) program has been developed with NASA funding. It provides accurate, real-time radiation monitoring along with radiation and space weather awareness for the global airspace up to 100 km altitude. The ARMAS app is part of this program and does two tasks: - it pairs with and controls the 7th generation ARMAS Flight Module (FM7) and the 12th generation ARMAS Flight Module (FM12) radiation detector (purchased separately) to provide the highest quality, real-time dose and dose rates in aircraft and suborbital vehicles. It is sensitive to radiation from all sources including heavy ions, alphas, protons, neutrons, electrons, and gamma-rays. - it provides radiation awareness by hosting real-time space weather data coming from dozens of ground- and space-based systems that report all the information relevant to radiation processes without requiring a purchase of the FM7 or FM12. ARMAS is the 'gold-standard' in real-time radiation monitoring and awareness used by professional pilots, business travelers, and commercial space tourists. The ARMAS program is developed and operated by Space Environment Technologies, which specializes in space weather as an official NOAA "Weather Ready Nation" Ambassador.
Screenshots
Verdict
The clearest difference is rating: RRA(SWTIS) at 5.0 against ARMAS's 4.3. RRA(SWTIS) also leads on in-app purchases (none vs 3). ARMAS's advantage is review sentiment (100% vs 86%). On price, ratings volume, update cadence and ads 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. ARMAS sells 3 in-app purchases, starting at $2.99 per year. RRA(SWTIS) asks for nothing beyond the download.
RRA(SWTIS) holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 5 and 6 respectively. Written reviews complicate that: 86% of RRA(SWTIS)'s written reviews are positive against 100% of ARMAS's, so the app with the better star average is not the one people write more warmly about.
RRA(SWTIS) ships an update every 4 months, ARMAS every 2 months. The most recent releases landed on September 22, 2026 and August 28, 2026 respectively.
| Parameter | RRA(SWTIS) | ARMAS |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | 4.3 (6 ratings) |
| Positive reviews | 85.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 5 | 6 — better |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 | 14.0 |
| Further details — not scored | ||
| Size | 20 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | 국립전파연구원 | Space Environment Technologies, LLC. |
Customer experience
RRA(SWTIS)
ARMAS
In-app purchases
RRA(SWTIS)
No in-app purchases
ARMAS
- Premier$2.991 Year
- Professional$2.991 Year
- Member$2.99









