OpenSig

E-signatures for any file

Free · In‑App Purchases · Designed for iPad

A DIGITAL PEN ON YOUR PHONE OpenSig is the simple, private way to sign documents and create independently verifiable proofs for any file. No complex workflows and no file uploads. Sign PDFs, images, videos, design files, code, ZIPs and more. Add optional encrypted notes to record purpose, intent or context. Use OpenSig to approve documents, lock in deliverables, protect your intellectual property, and timestamp important work. WHY OPENSIG? • Private by design – your documents never leave your device • Works with any file type and size • Create permanent, tamper-proof proofs • Add optional encrypted annotations such as purpose or message • No accounts, no uploads, no monthly subscription • Independent verification: anyone with the file can verify your proof WHAT YOU CAN DO • Sign and approve documents • Prove authorship of creative work • Timestamp drafts, designs and revisions • Protect ideas, pitches and deliverables • Verify file integrity before handoff • Add short encrypted notes or URLs to your signature • Share proofs with clients, collaborators or auditors No uploads. No central storage. Just simple, verifiable signing you control.

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Fixes About screen 'Rate Us' and social links and X logo

Version 1.0.3

The developer, David Potter, 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 Linked to You

    The following data may be collected and linked to your identity:

    • Contact Info
    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

  • Seller
    • David Potter
  • Size
    • 38.1 MB
  • Category
    • Productivity
  • Compatibility
    Requires iOS 15.1 or later.
    • iPhone
      Requires iOS 15.1 or later.
    • iPad
      Requires iPadOS 15.1 or later.
    • iPod touch
      Requires iOS 15.1 or later.
    • Mac
      Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
  • Languages
    • English
  • Age Rating
    4+
  • In-App Purchases
    Yes
    • 100 Signatures $49.99
    • 25 Signatures $14.99
    • 50 Signatures $24.99
    • 5 Signatures $3.99
    • 1 Signature $0.99
    • Learn More
  • Copyright
    • © 2025 OpenSig
  • Developer Website
  • Privacy Policy