FastID vs Docmark
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。
Docmark
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.
- Offline credential processing
- Customizable watermarks
- Batch editing and sorting
- Local and iCloud storage
- Organize and categorize credentials
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Docmark - Your Privacy Credential Management Assistant Completely offline, local processing, supports classified management of your credentials. By default, no network access permission is requested. Only after enabling iCloud synchronization will network permission be requested, due to the need to communicate with iCloud servers when using Apple's official iCloud development library 'CloudKit'. • Easily organize and categorize your various credentials, supports multiple credential files within one storage item, and individually add watermarks to specific credentials. • Customize watermark styles, including text size, density, transparency, and rotation angle • Support batch editing and sorting of multiple credential images • Support local storage and iCloud cloud synchronization for more secure data • Image processing is completely offline, protecting your privacy and security • iCloud synchronization uses Apple's official CloudKit to protect privacy and security.
Screenshots
Verdict
The clearest difference is review sentiment: Docmark at 100% against FastID's 50%. Docmark also leads on update cadence (monthly vs every 24 months). FastID's advantage is in-app purchases (none vs 1). On price, ads, device support and iOS requirement 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. Docmark sells 1 one-off in-app purchase. FastID asks for nothing beyond the download.
FastID ships an update every 24 months, Docmark monthly. The most recent releases landed on October 4, 2026 and October 15, 2026 respectively.
| Parameter | FastID | Docmark |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Update frequency | Every 24 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 46 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | Changing Information Technology Inc. | CometDust Technology (Guangzhou) Co., Ltd |
Customer experience
FastID
Docmark
In-app purchases
FastID
No in-app purchases
Docmark
- Pro$2.99
