# RRA(SWTIS) vs 우산챙겨요

The clearest difference is update cadence: RRA(SWTIS) at every 4 months against 우산챙겨요's every 11 months. RRA(SWTIS) also leads on iOS requirement (14.0 vs 16.2). On price, ads, 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) ships an update every 4 months, 우산챙겨요 every 11 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | RRA(SWTIS) | 우산챙겨요 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/rraswtis/id647086467/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 11 months |
| Monetization | Free | — |
| Size | 20 MB | 58 MB |
| Requires iOS | **14.0** | 16.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [국립전파연구원](https://appshunter.io/developer/647086470) | [JaeHyeon Lim](https://appshunter.io/developer/1680730749) |

## 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


### 우산챙겨요

[App page](https://appshunter.io/ios/app/id6447255393)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RRA(SWTIS) free?

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

### Is 우산챙겨요 free?

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

### Do RRA(SWTIS) or 우산챙겨요 have ads?

Neither RRA(SWTIS) nor 우산챙겨요 shows ads.

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

RRA(SWTIS) ships an update every 4 months, and 우산챙겨요 every 11 months. Most recently, RRA(SWTIS) was updated on November 1, 2026 and 우산챙겨요 on November 3, 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.*