# Secure Watermark vs Docmark

The clearest difference is in-app purchases: Secure Watermark at none against Docmark's 1. Secure Watermark also leads on update cadence (every 2 weeks vs monthly). Docmark's advantage is iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Docmark sells 1 one-off in-app purchase. Secure Watermark asks for nothing beyond the download.

Secure Watermark ships an update every 2 weeks, Docmark monthly. The most recent releases landed on June 1, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | Secure Watermark | Docmark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/secure-watermark/id6504274596/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 46 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [泽海 黄](https://appshunter.io/developer/1069894245) | [CometDust Technology (Guangzhou) Co., Ltd](https://appshunter.io/developer/1763733479) |

## 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


### Docmark

[App page](https://appshunter.io/ios/app/docmark/id6711330172)

This app helps you manage and secure your credentials with custom watermarks. It prioritizes privacy with offline processing and optional iCloud synchronization. Organize, categorize, and batch edit your documents for enhanced security.

**Highlights:** Offline credential processing, Customizable watermarks, Batch editing and sorting, Local and iCloud storage, Organize and categorize credentials

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $2.99 | one-time |


## Frequently asked questions

### Is Secure Watermark free?

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

### Is Docmark free?

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

### Do Secure Watermark or Docmark have ads?

Neither Secure Watermark nor Docmark shows ads.

### Which is updated more often, Secure Watermark or Docmark?

Secure Watermark ships an update every 2 weeks, and Docmark monthly. Most recently, Secure Watermark was updated on June 1, 2026 and Docmark on August 31, 2026.

---

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