# PeakUV vs 空玉

The clearest difference is update cadence: 空玉 at every 2 days against PeakUV's monthly. PeakUV's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PeakUV ships an update monthly, 空玉 every 2 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | PeakUV | 空玉 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Size | 64 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Happy Figs](https://appshunter.io/developer/1716550150) | [kiyotaka takanishi](https://appshunter.io/developer/6777109286) |

## What reviewers say

### PeakUV

[App page](https://appshunter.io/ios/app/peakuv/id6775639946)

**Features:** Apple Watch app

**In-app purchases:** none


### 空玉

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

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

**In-app purchases:** none


## Frequently asked questions

### Is PeakUV free?

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

### Is 空玉 free?

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

### Do PeakUV or 空玉 have ads?

Neither PeakUV nor 空玉 shows ads.

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

PeakUV ships an update monthly, and 空玉 every 2 days. Most recently, PeakUV was updated on October 28, 2026 and 空玉 on October 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.*