# RRA(SWTIS) vs ARMAS

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.

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.

## The numbers

| Metric | RRA(SWTIS) | ARMAS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/rraswtis/id647086467/reviews)** | [4.3 (6 ratings)](https://appshunter.io/ios/app/armas/id1446097782/reviews) |
| Number of ratings | 5 | **6** |
| Positive reviews | 85.7% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 20 MB | 38 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [국립전파연구원](https://appshunter.io/developer/647086470) | [Space Environment Technologies, LLC.](https://appshunter.io/developer/1446097781) |

## 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


### ARMAS

[App page](https://appshunter.io/ios/app/armas/id1446097782)

Real-time radiation monitoring for aviation and space weather awareness. Pairs with hardware detectors or provides data from global systems for pilots and travelers.

**Highlights:** 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

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premier | $2.99 | per year |
| Professional | $2.99 | per year |
| Member | $2.99 | one-time |


## Frequently asked questions

### Is RRA(SWTIS) free?

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

### Is ARMAS free?

ARMAS is free to download, with in-app purchases available.

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

RRA(SWTIS) is rated higher. RRA(SWTIS) averages 5.0 out of 5 from 5 ratings, while ARMAS averages 4.3 from 6 ratings.

### Do RRA(SWTIS) or ARMAS have ads?

Neither RRA(SWTIS) nor ARMAS shows ads.

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

RRA(SWTIS) ships an update every 4 months, and ARMAS every 2 months. Most recently, RRA(SWTIS) was updated on September 22, 2026 and ARMAS on August 28, 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.*