# RRA(SWTIS) vs KP Forecast

The clearest difference is in-app purchases: RRA(SWTIS) at none against KP Forecast's 2. RRA(SWTIS) also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. KP Forecast sells 2 in-app purchases, starting at $4.99 per month. RRA(SWTIS) asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 29, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | RRA(SWTIS) | KP Forecast |
| --- | --- | --- |
| 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** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Free | — |
| Size | 20 MB | 76 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [국립전파연구원](https://appshunter.io/developer/647086470) | [kota tada](https://appshunter.io/developer/1658942612) |

## 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


### KP Forecast

[App page](https://appshunter.io/ios/app/kp-forecast-auroravisibility/id6758230698)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (1 month) | $4.99 | per month |
| Premium (1 year) | $49.99 | per year |


## Frequently asked questions

### Is RRA(SWTIS) free?

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

### Is KP Forecast free?

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

### Do RRA(SWTIS) or KP Forecast have ads?

KP Forecast shows ads; RRA(SWTIS) does not.

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

RRA(SWTIS) ships an update every 4 months, and KP Forecast every 4 months. Most recently, RRA(SWTIS) was updated on October 29, 2026 and KP Forecast on October 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*