FastID vs Secure Watermark
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FastID
Easily capture and edit ID photos for online services. Automatically detect, crop, and correct images, and add custom watermarks to protect your photos before sharing.
- Automatic ID detection and capture
- Image correction and cropping
- Customizable watermark text
- Photo preview and editing
- Offline usage
- Share to other apps
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越來越多以往必須臨櫃才能辦理的事務都開啟了線上服務,例如:網銀開戶、線上投保、各式申請服務 … 等。 而這類線上服務通常需要提供證件照,面臨的問題不外乎是: 1. 如何方便的拍出品質不錯的證件照。 2. 即使用相機拍好照片,還要想辦法加上浮水印限制照片用途,才敢傳送出去。 而我們的App能為您解決上述問題,他可以: 1. 自動偵測證件並且拍照,也會幫您把影像校正並裁切好。 2. 可以自訂浮水印的文字訊息。 3. 方便的相簿可隨時預覽拍攝好的證件照,並再次編輯浮水印。 4. 可以將證件照分享到其他App。 安全說明: 我們的App可以離線使用,在使用過程中不會將證件照透過任何方式傳輸出去,只能由您自行以分享功能將證件照傳送給其他App使用。
Secure Watermark
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.
- 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
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[Applicable scenarios] - Protect your ID card, bank card, driver's license and other ID photos to prevent unauthorized use. - Protect your photos, paintings, digital works to prevent unauthorized use. [Watermark type] The application supports three types of watermarks: rich text watermarks, image watermarks and handwritten signature watermarks, and supports full screen and single watermark functions. [Rich text watermark] - Supports multi-line text watermarks. - Customizable font color, background color, transparency, font style (bold, italic), size, etc. - Provides adjustment functions for alignment, line spacing, watermark spacing and rotation angle. [ID mode] - ID mode supports importing ID card front and back images, and automatically adjusts to A4 paper size to ensure that the printing effect is consistent with the actual object. - You can choose to display the ID card outline and support manual scaling of the image. - Can be exported as an image or PDF document, with an output resolution of 300 DPI A4 paper. [Image watermark] - Customized images can be inserted as watermarks. - Supports adjusting image size, transparency, watermark spacing and rotation angle. [Handwritten Signature Watermark] - Provides multiple pen stroke types such as fountain pen, water pen, etc. - Customizable stroke color and size. - Supports undo, redo functions and eraser. - Provides a convenient watermark management list.
Screenshots
Verdict
The clearest difference is update cadence: Secure Watermark at every 2 weeks against FastID's every 24 months. FastID's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
FastID ships an update every 24 months, Secure Watermark every 2 weeks. Both last shipped on June 1, 2026.
| Parameter | FastID | Secure Watermark |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (1 ratings) — better |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 24 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 46 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Changing Information Technology Inc. | 泽海 黄 |
Customer experience
FastID
Secure Watermark
In-app purchases
FastID
No in-app purchases
Secure Watermark
No in-app purchases









