# Secure Watermark vs IDCard Go

The clearest difference is price: Secure Watermark at Free against IDCard Go's $2.99. Secure Watermark also leads on in-app purchases (none vs 7). IDCard Go's advantage is update cadence (every 3 months vs every 14 months). On ads, device support and iOS requirement there is nothing between them.

Secure Watermark is free to download; IDCard Go costs $2.99 up front. IDCard Go sells 7 in-app purchases, starting at $0.99 per 3 months. Secure Watermark asks for nothing beyond the download.

Secure Watermark ships an update every 14 months, IDCard Go every 3 months. The most recent releases landed on October 18, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Secure Watermark | IDCard Go |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/secure-watermark/id6504274596/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 6 MB | 7 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [泽海 黄](https://appshunter.io/developer/1069894245) | [乐祥 胡](https://appshunter.io/developer/1572365721) |

## What reviewers say

### Secure Watermark

[App page](https://appshunter.io/ios/app/secure-watermark/id6504274596)

Easily protect your sensitive documents and digital creations from unauthorized use. Add custom text, image, or handwritten signature watermarks to photos, IDs, and artwork. Offers advanced customization for text and image placement, with ID mode for seamless document protection.

**Highlights:** Rich text watermarks with full customization, Image watermarks with adjustable transparency, Handwritten signature watermarks, ID mode for secure document protection, Export as image or PDF at 300 DPI, Watermark management list

**In-app purchases:** none


### IDCard Go

[App page](https://appshunter.io/ios/app/idcard-go/id6756765080)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 身份证扫描助手-会员3个月 | $0.99 | per 3 months |
| 身份证扫描助手-会员每月 | $0.99 | per month |
| 身份证扫描助手-会员每周 | $0.99 | per 7 days |
| 身份证扫描助手-会员2个月 | $0.99 | per 2 months |
| 身份证扫描助手-会员6个月 | $0.99 | per 6 months |
| 身份证扫描助手-会员每年 | $1.99 | per year |
| 身份证扫描助手-终身会员 | $4.99 | one-time |


## Frequently asked questions

### Is Secure Watermark free?

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

### Is IDCard Go free?

IDCard Go costs $2.99, and also offers in-app purchases.

### Do Secure Watermark or IDCard Go have ads?

Neither Secure Watermark nor IDCard Go shows ads.

### Which is updated more often, Secure Watermark or IDCard Go?

Secure Watermark ships an update every 14 months, and IDCard Go every 3 months. Most recently, Secure Watermark was updated on October 18, 2026 and IDCard Go on October 25, 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.*