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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Secure Watermark adds a lasting, visible watermark to ID documents and photos — entirely on your device. No network required, no account, nothing uploaded. Protection of privacy is the whole point: your images never leave your iPhone or iPad. THREE MODES ID Document Watermark Photograph both sides of a document and let the app handle the framing. Secure Watermark finds the card edge on device, corrects the perspective and crops it automatically, then lays the front and back out on a single A4 sheet ready for a full-page watermark. If the edges cannot be found, the shot is cropped to the on-screen guide instead. You can import existing pictures instead of shooting. Works with ID Card, Driver License, Social Security Card and Bank Card, and the finished sheet exports as an image or a PDF. Full-Screen Watermark Import several photos at once and cover each one with a watermark that spans the whole frame. Built for the moment a picture has to leave your hands: reduce exposure risk before it travels. Custom Watermark Pick one watermark from the library and place it where you want it, on a single photo or a whole batch. THREE WATERMARK TYPES • Text watermark — build a clean, professional mark with rich text. • Image watermark — use any image of your own as the watermark. • Signature watermark — write a handwritten signature and use it as the watermark. WATERMARK LIBRARY Every watermark keeps its own look, so choosing one applies it to every photo you export, and ready-made templates give you a starting point. Font, color, opacity, rotation, spacing, margins and alignment are adjustable, and you can save, rename or delete your own watermarks at any time. PRIVACY Everything runs on device. Secure Watermark makes no network requests and needs no sign-in, and your pictures are never uploaded anywhere. The photos you capture for ID document mode stay inside the app's own sandbox while you work; only the watermarked result you export is saved to your photo library. PRO Pro removes the export limits: • Export full screen watermark images • Export certificate images and PDFs • Export several images at once • View the preview full screen Custom Watermark mode exports without Pro, one image at a time. The other two modes need Pro to export. Built for iPhone and iPad, with an interface in 22 languages. Your documents, your device.
Screenshots
Verdict
The clearest difference is iOS requirement: FastID at 13.0 against Secure Watermark's 17.0. On price, update cadence, ads and in-app purchases 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 14 months. The most recent releases landed on October 4, 2026 and October 18, 2026 respectively.
| 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 14 months — 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 | 6 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
Questions
Is FastID free?
Is Secure Watermark free?
Do FastID or Secure Watermark have ads?
Which is updated more often, FastID or Secure Watermark?
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