SignBack: Sign PDF Documents

Sign, fill, and send back PDFs with no SignBack account, no subscription, no watermark, and private on-device processing.

Stop printing. Stop scanning. Stop turning a simple signature into a whole project.

SignBack turns paperwork into a clean signed PDF from your iPhone or iPad. Open a PDF, fill the blanks, sign, and send it back without a SignBack account, subscription, or watermark. Use it for contracts, leases, government forms, waivers, intake forms, vendor paperwork, and everyday PDFs.

No account. No server upload for document processing. No watermark on exported PDFs.

KEY FEATURES

PRIVATE BY DESIGN • Your signing workflow happens on your device. Documents are not uploaded to a SignBack server for opening, filling, signing, converting, or exporting. Nothing leaves until you choose to share the finished file.

OPTIONAL iCLOUD SYNC • Keep your Signature Wallet, Signing Identities, Templates, profile name, and folder structure in sync across your own devices through your private iCloud. Sync is off by default, there is no SignBack account, and everything is encrypted on-device before upload. First sync gives you merge, replace, and review options so you stay in control.

SMARTER FAST FILL • Fast Fill highlights likely fields on many forms, including signature lines, printed names, dates, initials, emails, phone numbers, addresses, and checkboxes. It now adapts to document complexity with confidence guidance, helping find fields on dense forms like W-9s while avoiding instruction pages and false fill spots.

TAP-TO-ADD EDITING • Tap anywhere on a document to quickly add signatures, dates, text, and checkmarks. The redesigned bottom sheet includes identity-aware Quick Fill, inline text editing, floating size controls, and a cleaner color palette so you can finish documents faster without switching screens.

SCAN MULTI-PAGE DOCUMENTS • Use your camera to scan paper forms, contracts, notices, receipts, and multi-page documents. Turn pages into a clean PDF you can fill, sign, save, and send back.

OPEN MORE THAN PDFs • Open PDFs, Word documents, Pages files, text files, photos, and scans. Supported files convert into clean PDFs on-device so you can finish the paperwork that actually arrives.

SIGNING IDENTITIES FOR REAL ROLES • Create saved identities for personal, work, LLC manager, trustee, property manager, agent, and other signing roles. Each identity can fill the right contact details and signature block when needed, and Signing Identities can be protected with Face ID.

SIGNATURE WALLET • Draw or type your signature and initials once, then reuse them across documents. Signatures render with natural pen-like ink, smooth strokes, and tapered ends. Optional device authentication can help protect your app and signature wallet.

ORGANIZE YOUR PAPERWORK • Save reusable templates for forms you handle often • Organize documents into folders • Use Apartment, Rental, and custom folder categories • Keep separate signing roles and reusable details • Access SignBack from the share sheet, home-screen widget, and Siri Shortcuts

SEND BACK A CLEAN PDF • When you are done, Send Back flattens your fields into the document and opens the share sheet. Large PDFs can be compressed while still letting you send the original with iCloud Mail Drop if you prefer.

ON-DEVICE DOCUMENT SUMMARIES • On supported devices, SignBack can use Apple Intelligence to summarize a document and surface key points before you sign. Requires compatible hardware, supported system software, Apple Intelligence enabled, and the model available. Summaries may be incomplete and do not replace reading the original document or getting professional advice.

ACCESSIBLE PAPERWORK TOOLS • SignBack includes improved VoiceOver support across sync settings, Fast Fill, the PDF editor, folder picker, and identity list.

The next time someone says “just sign this and send it back,” do exactly that with SignBack. Free and private by design.

Apple Intelligence, Face ID, iCloud, iCloud Drive, iPad, iPhone, and Siri Shortcuts are trademarks of Apple Inc.