# 四维看看 vs RainMark

The clearest difference is update cadence: RainMark at every 10 days against 四维看看's every 5 weeks. RainMark also leads on device support (4 vs 2). On price, ads, in-app purchases 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.

四维看看 ships an update every 5 weeks, RainMark every 10 days. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | 四维看看 | RainMark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rainmark/id6751396538/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 10 days** |
| Monetization | — | Free |
| Size | 105 MB | 69 MB |
| Requires iOS | **11.0** | 12 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [珠海市四维时代网络科技有限公司](https://appshunter.io/developer/1246105353) | [峻宏 刘](https://appshunter.io/developer/1834818077) |

## What reviewers say

### 四维看看

[App page](https://appshunter.io/ios/app/id1301028541)

**In-app purchases:** none


### RainMark

[App page](https://appshunter.io/ios/app/rainmark/id6751396538)

Enhance your photos with professional watermark borders that automatically display shooting parameters. Choose from a variety of design templates and customize your signature and layout for a unique look. Export your creations in original quality with fast batch processing.

**Highlights:** Smart EXIF parameter reading, Professional design templates, Deep watermark customization, Signature support (text/image), Ultra-fast batch processing, Original quality export, Real-time preview

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 四维看看 free?

四维看看 is free to download, with no in-app purchases.

### Is RainMark free?

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

### Do 四维看看 or RainMark have ads?

Neither 四维看看 nor RainMark shows ads.

### Which is updated more often, 四维看看 or RainMark?

四维看看 ships an update every 5 weeks, and RainMark every 10 days. Most recently, 四维看看 was updated on October 3, 2026 and RainMark on October 8, 2026.

---

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