How to Use DocSigner Pro
Master offline PDF signing, magnetic alignment snapping, and certified document sealing in 5 simple steps.
Import Your PDF Document
100% Offline Vault Storage
Open DocSigner Pro and tap the floating '+' button or 'Import PDF' in the Vault. Select any PDF contract, agreement, tax form, or lease from your Android device using the secure native file picker. Your file is copied directly into the app's encrypted sandbox without ever connecting to an external server.
- DocSigner Pro supports multi-page contracts of any length.
- Thumbnails and pages render in real-time with smooth zoom and pan.
- Original files in your Downloads folder remain unaltered.
Create Your Signature & Initials
Vector Ink Drawing or Calligraphic Script Fonts
Tap the 'Signature' or 'Initials' tool to open the Signature Studio. You have two powerful ways to sign:
Draw with Finger or Stylus
Enjoy high-precision 120 FPS vector drawing with natural curve smoothing. Choose your pen thickness (Fine, Medium, Bold) and legal ink color (Classic Black, Executive Blue, Review Red, Emerald Green).
8 Executive Calligraphic Styles
Type your name in Settings to instantly preview and select from 8 authentic handwritten cursive styles, automatically generated for you.
- Tap 'Save Default' to reuse your verified signature across multiple documents in one tap.
- Switch to the 'Initials' tab for quick multi-page contract initialing.
Place Fields with Magnetic Snapping
Precision Layout Without Clutter
Drag your signature, printed name, date stamp, or checkboxes onto the document page. As you drag, DocSigner Pro's intelligent alignment engine activates:
- Cyan guide rails appear automatically when your field aligns horizontally or vertically with nearby fields.
- Magnetic attraction gently snaps your field into position for a clean, professional legal appearance.
- Pinch or drag the corner handle to resize the signature to match the form line.
Lock with AES-256 Encryption & Biometrics
Military-Grade Document Security
Protect sensitive business terms, financial information, or personal identifiers before sharing:
- In the Preview screen, tap 'Encrypt PDF' to set a secure password.
- The exported PDF is sealed using 256-bit AES encryption, preventing unauthorized reading or printing.
- Enable 'Biometric Vault Lock' in Settings to require fingerprint or face unlock every time the app opens.
Finalize, Audit Seal & Instant Share
Tamper-Evident SHA-256 Verification
When ready, tap 'Finalize & Sign'. DocSigner Pro burns your vector signatures into the PDF, seals the file, and computes a unique SHA-256 cryptographic hash.
- View the Document Summary screen to inspect the cryptographic certificate and audit timestamps.
- Share finalized PDFs instantly via Email, WhatsApp, Google Drive, or Android wireless printing.
- Any subsequent alteration to the document will invalidate the SHA-256 fingerprint, guaranteeing non-repudiation.
Experience Effortless Document Signing
No printers, no scanners, and zero cloud privacy risks. Download DocSigner Pro now.