PlainCopyGuide
Sign a PDF on iPhone Without Printing
Short answer
To sign a PDF on iPhone with PlainCopy, open the document, tap Sign, draw your signature once, and drag it onto the page. The signed copy is saved with no watermark and stays yours even if Pro ends. Sign is a Pro feature; it places a signature, it does not fill form fields.
Updated
How Do I Sign a Scanned Document?
Scan or import the document, open it and tap Sign. Draw your signature with a finger, then drag it where it belongs, pinch or use the slider to size it, and tap Save Signed Copy. The signed copy is a new PDF in your library; the original stays as it was.
Can I Reuse My Signature?
Yes. PlainCopy keeps up to three saved signatures on your iPhone, so the next document is a tap. Delete a saved signature at any time.
| Task | In PlainCopy |
|---|---|
| Draw a signature with a finger | Yes |
| Save signatures for reuse | Up to three, on your iPhone |
| Place, move and resize on any page | Yes |
| Type text into form fields | Not yet |
| Password on the PDF you send | Yes |
| Watermark on the signed PDF | Never |
Can I Fill In Form Fields?
Not in this version. PlainCopy places a drawn signature on a page; it does not type text into fields. For a paper form, fill it in by hand, scan it, sign it and send it.
Will a Drawn Signature Be Accepted?
That depends on who asked for the document and the rules where you live, so PlainCopy cannot promise it. Some documents need a verified electronic signature service instead. Ask the recipient if you are not sure.
How Do I Send the Signed PDF?
Tap Share. Email attaches it with the document name as the subject, Files saves it to any folder, and with Pro you can add a password or use a Send To destination. The signed PDF never gets a watermark.
Signing Questions
Is signing free?
No. Sign is a Pro feature: $34.99 a year with a 7-day free trial, $6.99 a month, or $59.99 once.
What happens to signed PDFs if Pro ends?
Nothing. They stay signed, open and shareable.
Does the original stay unsigned?
Yes. Signing saves a signed copy; the original is kept as it was.
Sign the Next One on Your Phone
Sign is part of Pro. Try it free for 7 days.