A simple signing app for documents you just need to send back.
Many PDF signing tools are built around accounts, trials, upload workflows, or subscriptions. SignBack is built for the ordinary document that arrives by email, Messages, Files, AirDrop, or a scan: open it, understand it, fill what is needed, sign it, and send back a clean PDF.
It is especially useful when you are handling personal paperwork, landlord forms, lease addenda, vendor documents, W-9s, disclosures, waivers, and other documents where you want a fast local workflow from your iPhone or iPad.
What SignBack helps you do
- Open PDFs, images, scans, Word documents, Pages files, text, rich text, HTML, CSV, and markdown. Supported files convert to PDFs on-device.
- Fill common fields. Add signatures, initials, names, dates, text, email, phone, address, checkmarks, x-marks, highlights, whiteout, and freehand drawing.
- Use Fast Fill. SignBack highlights likely blanks such as names, dates, initials, signatures, addresses, checkmarks, and text fields so you can move through forms faster.
- Reuse signatures and identities. Keep personal, work, LLC manager, trustee, agent, property manager, and other signing roles ready.
- Send back a clean PDF. SignBack flattens your finished document and opens the iOS share sheet so you can send, save, or AirDrop it.
Private by design
SignBack does not require a SignBack account and does not upload documents to a SignBack server for core signing. Documents, signatures, identities, templates, OCR, and Fast Fill analysis are processed locally. Files leave when you choose to export, save, or share them.
On supported devices, document summaries use on-device system intelligence. Summary availability depends on device, system software, language, Apple Intelligence settings, and model availability. Automated summaries may be incomplete or inaccurate and do not replace reading the original document or professional advice.
Useful for leases, addenda, and property paperwork
Property paperwork often arrives at inconvenient moments: a tenant form, a vendor W-9, a disclosure, an addendum, or a quick signature request. SignBack keeps multiple signing identities available so you can sign in the right capacity, including as an individual, LLC manager, trustee, agent, or property manager.
What SignBack is not
SignBack is not an enterprise eSignature platform with server-side routing, identity verification, or audit trails. It is a practical app for personally filling, signing, flattening, and returning documents from iPhone or iPad.
Download SignBack
SignBack is available for iPhone and iPad on the App Store.
