Inkstone: Sign PDF & Docs
eSign Contract & Share Link
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Prepare documents in seconds and share a secure signing link. Recipients sign in their browser with no app or account required. Clear pricing with no trial traps.
Prepare documents and get them signed in minutes. Generate a secure link — recipients sign right in their browser with no app to install and no account required.
Inkstone makes document signing effortless for landlords, agencies, clinics, and professionals who need fast, legally robust electronic signatures.
WHY PEOPLE CHOOSE INKSTONE
Most signature apps lock basic sending behind $10+ monthly subscriptions with confusing trial traps. Inkstone offers clear, fair pricing and makes signing friction-free for your clients and partners.
PREPARE & PLACE FIELDS
• Import any PDF or scan paper documents with your camera
• Place signature, initial, date, and text fields exactly where needed
• Pinch to zoom for precise alignment on fine print
• Clean, legible field placement on both iPhone and iPad
SHARE A SECURE SIGNING LINK
• Generate an encrypted, tamper-evident signing link in one tap
• Share via Messages, WhatsApp, AirDrop, or any chat app
• Recipients open and sign in their mobile or desktop browser
• Zero friction for signers: no app download, no account creation
PROOF THAT HOLDS UP
Every signed document includes a comprehensive audit page:
• SHA-256 cryptographic digest before and after signing
• Timestamped audit trail and signer consent verification
• Sealed PDF with tamper-evident digital verification
YOUR FILES, AUTOMATICALLY SAVED
Completed documents are automatically saved to your Files app and iCloud Drive, ensuring you always keep a permanent, secure copy.
STRICT PRIVACY & 90-DAY RETENTION
Documents stored on our servers are automatically deleted 90 days after signing — for everyone, Pro included. We never hold third parties' sensitive identification or personal data indefinitely.
TEMPLATES
Save reusable form templates — rental agreements, consent forms, work orders — and generate new signing documents with fields pre-placed in seconds.
INKSTONE PRO
Upgrade to Inkstone Pro for unlimited signing links and watermark-free documents.
Templates are blank formatting references, not legal advice.
SUBSCRIPTION DETAILS
Inkstone Pro is an auto-renewing subscription: 1 month (USD 5.99) or 1 year (USD 39.99). Payment is charged to your Apple Account at confirmation of purchase. It renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel in your device Settings after purchase. There is no free trial.
Terms of Use: https://inkstone-app-prod.web.app/terms
Privacy Policy: https://inkstone-app-prod.web.app/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, YI SHIH LIU, 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
- YI SHIH LIU
- Size
- 10.2 MB
- Category
- Business
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 6 more
- English, French, German, Japanese, Korean, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Inkstone Pro Annual $39.99
- Inkstone Pro Monthly $5.99
- Copyright
- © 2026 Louis Liu