Adobe means three different things
Adobe Acrobat Reader is the free PDF app on iPhone. It includes Fill & Sign, which lets you type into a form and add a signature. For basic signing, that's free, and it works.
Adobe Acrobat (paid) adds editing, converting, combining and more on a subscription. Most people signing a lease don't need any of it.
Adobe Acrobat Sign is Adobe's sending platform — the DocuSign-style service for sending documents to others and tracking signatures. If that's your job, compare it with DocuSign, not with eSign PDF.
eSign PDF vs Adobe on iPhone
We compare the jobs, not every feature. Adobe's plans change often, so check Adobe's site for current pricing.
| Feature | eSign PDF | Adobe Fill & Sign (Acrobat Reader) | Adobe Acrobat Sign |
|---|---|---|---|
| Job | Sign a PDF you received | Sign a PDF you received | Send documents for others to sign |
| Price | $59.99 one-time (US) | Free for basic Fill & Sign; paid upgrades for more | Subscription |
| Account | None | Optional for basics; Adobe account for cloud and paid features | Adobe account |
| Where the file lives | On your iPhone | On device or Adobe cloud storage | Adobe cloud |
| What you install | A small signing app | A full PDF reader and suite | Web service and apps |
| Flattened export | Every export, on-device | Depends on how you save and share | Completed files from the service |
| Date, checkbox, initials | Yes | Yes | Fields placed by the sender |
| Edit or convert PDFs | No | Paid Acrobat features | Not the focus |
| Send for signature | No | No | Yes |
Other plans and local prices for eSign PDF are shown in the App Store.
Where eSign PDF is different
It does one job. Open the PDF from Mail or Files, sign, fill the date and checkboxes, export. There is no PDF editor, no converter, no upsell into a suite while you're trying to sign.
It flattens every time. The signature and fields become part of the page, so the person on Windows or Android sees exactly what you see. You don't have to remember a setting. Why unflattened signatures disappear explains the problem.
No account, nothing uploaded. The file stays on your iPhone. That matters for a lease or a W-9 with your Social Security number on it. One price: $59.99 one-time (US), not a monthly plan.
Which one fits your PDF
Think about the document in front of you. A one-page form going to someone who will open it in Acrobat anyway? Free Fill & Sign is a reasonable choice, and you may not need to buy anything.
A multi-page lease or onboarding packet with dates, checkboxes and initials, going back to an office that uses Windows? That's where a focused signing app earns its price: you tap the fields, sign once, and export a flattened file without wondering how it will look on their end. Here's how to fill PDF forms on iPhone in more detail.
And if you're the one sending the document out, neither Fill & Sign nor eSign PDF is the right tool. Look at Acrobat Sign or DocuSign, which are built to collect other people's signatures.
What Adobe Acrobat reviewers complain about
We don't invent quotes. On the App Store, lower ratings for Acrobat Reader tend to cluster around subscription prompts and trials, canceling in iOS Settings, pop-ups pushing paid features, and the app feeling heavy for a quick signature.
Many of those reviewers needed edit or convert features. If you only need to sign and send back, Fill & Sign may already be enough — and if it isn't, a small signing app is a better fit than a suite.
When Adobe is the better choice
- ✓You only need a basic signature and don't want to pay anything — use free Fill & Sign.
- ✓You already pay for Acrobat and use it on your computer.
- ✓You need to edit text, convert to Word, or combine PDFs.
- ✓You send documents for others to sign — look at Acrobat Sign or DocuSign.
- ✓You also sign on Android or Windows.
Verdict
Choose Adobe Fill & Sign if free matters most
It's a solid free option for basic signing, especially if you already have Acrobat Reader installed.
Choose Adobe Acrobat Sign if you send
You need other people to sign your documents with tracking. That's a sending platform's job.
Choose eSign PDF if you want sign-and-send with no account
A small app that fills, signs and flattens a received PDF on your iPhone. Nothing uploaded, no subscription, $59.99 one-time (US).
FAQ
Is Adobe Fill & Sign free on iPhone?+
Basic Fill & Sign in Adobe Acrobat Reader is free. Editing, converting and other features are part of Adobe's paid plans.
Is Adobe Acrobat Sign the same as Fill & Sign?+
No. Fill & Sign is for signing a document yourself. Acrobat Sign is Adobe's service for sending documents to other people for signature.
Do I need an Adobe account to sign a PDF with eSign PDF?+
No. eSign PDF has no account of any kind. The PDF stays on your iPhone.
Why use eSign PDF if Adobe has a free option?+
If free Fill & Sign does the job, use it. People pick eSign PDF for a small single-purpose app, automatic flattening, no account, and a one-time price of $59.99 one-time (US).
Can eSign PDF edit or convert PDFs?+
No. It signs and fills PDFs, adds dates, checkboxes, initials and stamps, and exports a flattened file. It is not a PDF editor.