mackMack Grissom
Engineering possibility.
Sign Any PDF app icon

Business · iPhone

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Open the PDF straight from Mail, Files or Messages, fill it in, put your signature where it goes, and send it. Nothing leaves your phone, and there is no subscription.

Download on the App Store

Who it is for

Signing a PDF should take two minutes, and instead it usually means uploading a contract to a website you have never heard of, or starting a monthly plan to export one document. Sign Any PDF does the whole job on the device, and you buy it once.

What it does

  • Everything on device. Documents are never uploaded. The whole flow — open, fill, sign, export — happens on your iPhone or iPad.
  • Fill the whole form free. Open any PDF and complete it before deciding to buy. Exporting the finished file is what Pro unlocks — the free tier is never watermarked.
  • Signature and initials. Draw your signature once, then place it and your initials exactly where they go, on any page.
  • Everything a form needs. Typed text, dates, checkmarks and crosses, anywhere on any page.
  • Scan paper to PDF. Photograph a paper form and get a clean PDF, with edges and shadows handled.
  • Autofill and page tools. Save your name, address and phone and tap them into any form. Reorder, rotate and delete pages, or pull pages in from another PDF.
  • Lock what you entered. Flatten the filled fields so the recipient cannot change your answers, and password-protect the file.

Common questions

Are my documents uploaded anywhere?
No. Filling, signing and exporting all happen on your device. The app has no account and no document upload.
Is there a subscription?
No. Pro is a single payment with nothing to renew.
Is the free version watermarked?
No. The free tier never watermarks anything — you can open and fill any PDF completely. Exporting and sharing the finished file is what Pro unlocks.
Can I sign a form that is not a fillable PDF?
Yes. You place text, dates, checkmarks and your signature anywhere on the page, so scanned and flat PDFs work the same as fillable ones.
Is an electronic signature like this legally valid?
In many countries an electronic signature is legally recognised for most everyday agreements, but the rules vary by country and by document type. For anything consequential, check what your jurisdiction requires.