# 证件水印 vs PDF转换编辑

The clearest difference is price: PDF转换编辑 at Free against 证件水印's $1.99. PDF转换编辑 also leads on update cadence (every 6 weeks vs every 14 months) and iOS requirement (12.0 vs 14.0). 证件水印's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

PDF转换编辑 is free to download; 证件水印 costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

证件水印 ships an update every 14 months, PDF转换编辑 every 6 weeks. The most recent releases landed on October 21, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 证件水印 | PDF转换编辑 |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (12 ratings)](https://appshunter.io/ios/app/id1582930176/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 92.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 14 months | **Every 6 weeks** |
| Monetization | Paid | — |
| Size | 2 MB | 97 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [阳理 江](https://appshunter.io/developer/1645314423) | [广州市企云信息技术有限公司](https://appshunter.io/developer/1869306960) |

## What reviewers say

### 证件水印

[App page](https://appshunter.io/ios/app/id1582930176)

This utility app allows users to add text watermarks to documents and photos, protecting personal information from misuse. It supports batch processing for up to 50 images and can export in PDF or image formats, including an A4 print mode.

**Highlights:** Add text watermarks, Protect privacy information, A4 copy print mode, Export PDF or image, Batch watermark up to 50 photos, No network requests

**Features:** Vision Pro support

**In-app purchases:** none


### PDF转换编辑

[App page](https://appshunter.io/ios/app/pdf/id6758146087)

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

**In-app purchases:** none


## Frequently asked questions

### Is 证件水印 free?

证件水印 costs $1.99, with no in-app purchases.

### Is PDF转换编辑 free?

PDF转换编辑 is free to download, with no in-app purchases.

### Do 证件水印 or PDF转换编辑 have ads?

PDF转换编辑 shows ads; 证件水印 does not.

### Which is updated more often, 证件水印 or PDF转换编辑?

证件水印 ships an update every 14 months, and PDF转换编辑 every 6 weeks. Most recently, 证件水印 was updated on October 21, 2026 and PDF转换编辑 on October 6, 2026.

---

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