# RRA(SWTIS) vs SkyCast Radar

The clearest difference is ads: RRA(SWTIS) at none against SkyCast Radar's shown. SkyCast Radar's advantage is update cadence (every 3 days vs every 4 months). On price, in-app purchases, device support and iOS requirement 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, SkyCast Radar every 3 days. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | RRA(SWTIS) | SkyCast Radar |
| --- | --- | --- |
| 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** | Yes |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 20 MB | 48 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [국립전파연구원](https://appshunter.io/developer/647086470) | [Faruque Ahamed Mollick](https://appshunter.io/developer/1878330013) |

## 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


### SkyCast Radar

[App page](https://appshunter.io/ios/app/skycast-radar/id6760249237)

**Features:** macOS Compatibility, 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 SkyCast Radar free?

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

### Do RRA(SWTIS) or SkyCast Radar have ads?

SkyCast Radar shows ads; RRA(SWTIS) does not.

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

RRA(SWTIS) ships an update every 4 months, and SkyCast Radar every 3 days. Most recently, RRA(SWTIS) was updated on October 8, 2026 and SkyCast Radar on October 15, 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.*