AutoSignMark: PDF Assistant
PDF sign, markup & merge
Free · In‑App Purchases
Sign, mark up, and merge PDFs on iPhone,iPad & Mac. Save a markup layout once and reuse it on similar files. Scan, stamp, fill,
export — one purchase unlocks all three.
AutoSignMark is a fast, private PDF editor for iPhone, iPad, and Mac. Sign documents, mark them up by hand or with text, stamp your
signature, merge files, and save — all on device, with no account required.
Requires iOS/iPadOS 17.6 or later, or macOS 14.6 or later. One purchase unlocks all three platforms with the same Apple ID.
FREE TO USE
• Open and view PDF, JPG, PNG, and HEIC files
• Open password-protected PDFs (enter the password to unlock)
• Zoom, rotate, and navigate pages
• Paste a URL to download and open a PDF
• Scan documents with the camera (iPhone/iPad)
PRO FEATURES
• Freehand drawing with adjustable color and thickness (Apple Pencil supported on iPad)
• Add text boxes with custom color and size
• Save and reuse your signature; import an image as a stamp with automatic background removal
• Eraser to remove annotations
• Markup Presets: save a markup layout once and apply it to similar documents
• Merge multiple PDFs and photos into one file; convert photos to PDF
• Save (overwrite) or Save As (export a clean, password-free copy)
• Export pages as JPG images
• Quick Passwords: store frequently used passwords and auto-try them on encrypted PDFs
• Export and import your templates and signatures as a backup
PRIVATE BY DESIGN
AutoSignMark does not collect, track, or sell any data. Your files, signatures, and settings stay on your device. There is no
analytics, no advertising, and no third-party SDKs. The app connects to the internet only when you explicitly download a PDF.
PRICING
Start with a 7-day free trial that unlocks all Pro features. After the trial, keep Pro with an Annual subscription or a one-time
Lifetime purchase. Free viewing features remain available without a purchase.
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
The developer provides a software tool only and does not participate in,
monitor, or endorse any specific use by the user. The user bears sole
responsibility for any dispute or liability arising from improper use.
Stamps and signatures produced by this app are image files and are not
electronic or digital signatures under applicable law.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Auto-Unlock — Major Fixes
・Fixed encrypted PDFs still prompting for a password when opened from the Files app or Share Sheet; auto-unlock now works reliably on cold start.
・Files that can't be read (corrupted, or not yet downloaded from iCloud) now show a clear message instead of an incorrect password prompt.
Stamp Background Removal
・White-background removal is now applied consistently to both red and blue stamps, fixing intermittent results.
Other
・Auto-unlock with saved passwords is now enabled by default.
・Various refinements and stability improvements.
The developer, CHUNG CHENG CHIU, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- CHUNG CHENG CHIU
- Size
- 14.4 MB
- Category
- Productivity
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later.
- iPhone
- Languages
English and 3 more
- English, Japanese, Simplified Chinese, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- AutoSignMark Pro Lifetime $79.99
- AutoSignMark Pro Annual $29.99
- Copyright
- © 2026 CHUNG CHENG CHIU
