Help · Contact · Rights

We actually answer.

Most of DuPDF lives on your device, so most questions are answered in the manuals. The app is iPhone and iPad only, and the only official download is the Apple App Store — we never email an IPA or APK. For everything else — accounts, rights requests, search reports, copyright notices — write to us. This page is the App Store Support URL.

GENERAL

Product & account

Questions about the app, subscriptions, complimentary Ultra Pro and Pro, or deleting an account.

dupdf@proton.me
PRIVACY

Data rights

Access, correction, deletion, restriction, portability, or withdrawal of consent. We respond within the time required by applicable law.

dupdf@proton.me Read the Data Policy
App Store listing

Privacy, terms, and this page.

These HTTPS pages are the App Store Connect destinations. They require no login.

SUPPORT URL

This page

Contact, account deletion, subscriptions, and manuals. Paste this URL into App Store Connect → Support URL.

https://dupdf.com/support.html
MARKETING URL

dupdf.com

Product homepage: features, pricing, and Get DuPDF. Paste the apex URL into Marketing URL.

Open the marketing site
How to get unstuck

Start here, then write.

Email dupdf@proton.me from the address associated with your Apple ID, or use the contact options in the app. We will process deletion of account and associated personal data we hold in accordance with applicable law. Locally stored documents, annotations and signatures stay on your device until you delete them or uninstall the app.

Edit PDF Text and PDFtoW conversion are Beta. In some conversions, figures or images can end up beneath text boxes. Inspect the converted document carefully — including behind text — before sharing or publishing. Keep an independent original. See the Edit PDF Text manual.

Manage or cancel in your device’s App Store subscription settings. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Refunds follow Apple’s policies; we do not control refund decisions. New installs include complimentary Ultra Pro for 30 days, then complimentary Pro for 30 days, then return to Free unless you subscribe.

Stop viewing that result and email us a description at dupdf@proton.me so we can review and improve safeguards. Moderation is an aid, not a guarantee. Parents and guardians should supervise search use by minors, and are strongly encouraged to actively monitor children under 10.

Check free storage and file permissions, then try again — in-memory edits remain until you leave the reader. DuPDF does not host your documents. Keep independent backups of anything important. Device failure, uninstall, or hardware faults can lose locally stored files; that is why the Data Policy asks you to maintain current backups before relying on the app.

01

User manuals

Atelier, Image Studio, Inline Text Editor, and Edit PDF Text — the same chapters that live in Settings > Help.

Read the manuals
02

Policy PDFs

The same documents presented at first launch, available as downloadable PDFs for your records.

Download policies
03

Security architecture

How the Double PQC Shield is built, what it assumes, and where it ends.

Open the Shield