Acrobat Reader is a fine PDF viewer and signer for very basic cases. It hits a wall the moment you need to genuinely change a document.
Here is how Flint compares for the jobs Reader cannot quite do.
What Acrobat Reader actually does
Reader is free and views PDFs reliably across every platform. It supports basic commenting, simple form filling and a limited signing flow. For pure consumption it is great. Most of the friction starts the moment you try to edit text, merge files or convert a PDF to Word — Reader will nudge you toward a paid Acrobat tier.
Where Flint goes further
Flint is a full browser editor: edit a PDF, sign documents, merge several files, split a long PDF, compress for email, and convert to and from Word, Excel and PowerPoint. There is no upsell wall between viewing and editing — the editor is the product.
Pricing compared
Reader is free. Flint has a free tier for the lightweight tasks, plus a day pass for one-offs and a flat Pro plan for regulars. If you only ever read PDFs, stay with Reader. If you find yourself emailing things to a colleague to be edited, you have already outgrown it.
Best for…
Reader for purely viewing PDFs and the occasional signature. Flint as soon as you need to change text, rearrange pages, redact or convert. Most people land on Flint within a week of trying to keep using Reader for editing.
FAQ
Is Flint free like Reader?
Flint has a free tier for light tasks. For heavier editing or conversion at volume you would pick the day pass or Pro — but viewing and basic edits are free.
Can Reader edit PDF text?
No. Reader is read-mostly. To change body text you need either Acrobat Pro, Acrobat Online, or a tool like Flint.
Can I sign a PDF in Reader?
Reader supports a limited self-sign workflow. For multi-party signing or a saved signature across sessions, Flint is more straightforward.
Keep Reader for reading. When you need to actually change something, drop the file into Flint.