eSign PDF Guide
Markup is free and built-in. But the moment you need dates, checkboxes, or multi-page reliability, it falls apart. Here's exactly where Markup stops and a real signing app starts.
Apple Markup is the built-in annotation tool on iPhone and iPad. You can use it to draw on PDFs, add text, and create a signature. For basic single-page annotations, it works fine. The problem is that most people need more. Markup can't add date stamps, can't add checkboxes, can't add initials as a separate element, and has a known bug where signatures placed on pages 2+ of a multi-page PDF can disappear when saving. Markup signatures are also just image overlays. They're not flattened into the PDF. Anyone with a PDF editor can select and delete them in seconds.
Here's what happens when you rely on Markup for real document signing. You open a 5-page lease. You sign page 1 fine. You navigate to page 3 to initial. You sign it. You save. You open the document to check. The signature on page 3 is gone. This is a documented iOS bug that Apple hasn't fixed. Even when signatures stick, Markup creates removable annotations. Your landlord, client, or employer receives a PDF where your signature can be deleted with two clicks. There's no tamper protection, no flattening, no proof that the document hasn't been modified. And when the form asks for today's date? You'll be using the text tool and manually typing it. Checkbox? Draw a tiny checkmark and hope it's positioned right. eSign PDF has dedicated tools for all of this. Auto-date stamps, one-tap checkboxes, reliable multi-page signing, and tamper-proof export.
Markup is fine for adding a quick signature to a single-page document that doesn't need dates, checkboxes, or legal security. If you're just annotating a screenshot or signing a simple note, Markup works.
Any document longer than one page needs a dedicated signing app. eSign PDF handles multi-page contracts, leases, and forms without the disappearing signature bug. Navigate between pages with thumbnails.
Dates, text fields, checkboxes, initials, stamps — Markup can't do any of these well. eSign PDF has dedicated tools for each one. AI detection even highlights where they should go.
Markup doesn't flatten signatures. eSign PDF does. When you export, signatures become permanent parts of the PDF that can't be removed or tampered with. For any legally important document, this matters.
Markup is free. But free doesn't mean sufficient. For contracts, leases, NDAs, tax forms, and any document that matters legally, you need reliable multi-page signing, form filling tools, and tamper-proof export. eSign PDF fills every gap that Markup leaves open. It's the upgrade you need when free tools stop being enough.
Apple hasn't officially acknowledged or fixed the multi-page signature bug as of iOS 19. Signatures placed on pages 2+ of a multi-page PDF can still vanish when the document is saved or shared. It doesn't happen every time, but it happens enough that you can't rely on it.
Yes. Markup signatures are annotation layers, not permanent parts of the PDF. Anyone with a PDF editor (free ones exist) can select and delete them. Flattened signatures from eSign PDF can't be removed.
Markup is fine for quick, low-stakes annotations on single-page documents. Signing a friend's birthday card PDF? Markup is fine. Signing your apartment lease? Use a real signing app.
Yes. eSign PDF works on both iPhone and iPad with full Apple Pencil support. The larger iPad screen makes it even easier to sign and fill multi-page documents.