# 空玉 vs VortexWeather

The clearest difference is in-app purchases: 空玉 at none against VortexWeather's 4. 空玉 also leads on ads (none vs shown) and update cadence (every 2 days vs fortnightly). VortexWeather's advantage is iOS requirement (15.1 vs 17.0). On price and device support there is nothing between them.

Both are free to download. VortexWeather sells 4 in-app purchases, starting at $4.99 per month. 空玉 asks for nothing beyond the download.

空玉 ships an update every 2 days, VortexWeather fortnightly. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 空玉 | VortexWeather |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/vortexweather/id6796505055/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 7 MB | 66 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [kiyotaka takanishi](https://appshunter.io/developer/6777109286) | [VORTEXWEATHER LLC](https://appshunter.io/developer/6796505057) |

## What reviewers say

### 空玉

[App page](https://appshunter.io/ios/app/id6788443049)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### VortexWeather

[App page](https://appshunter.io/ios/app/vortexweather/id6796505055)

Access detailed weather data including hurricanes, radar, satellite, and forecast models. Offers free basic features and paid subscriptions for advanced capabilities like 3D viewers and extended forecast data.

**Highlights:** Live storm tracks and forecast cones, NEXRAD radar and satellite imagery, Forecast radar and satellite animation, Numerical forecast models (GFS, ECMWF), Real-time lightning detection, 3D hurricane and radar viewers (Pro)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Monthly | $4.99 | per month |
| Pro Monthly | $9.99 | per month |
| Basic Annual | $50.90 | per year |
| Pro Annual | $99.99 | per year |


## Frequently asked questions

### Is 空玉 free?

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

### Is VortexWeather free?

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

### Do 空玉 or VortexWeather have ads?

VortexWeather shows ads; 空玉 does not.

### Which is updated more often, 空玉 or VortexWeather?

空玉 ships an update every 2 days, and VortexWeather fortnightly. Most recently, 空玉 was updated on October 28, 2026 and VortexWeather on October 25, 2026.

---

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