Sign & fill PDFs on your iPhone — private by design, no subscription.
Need help or found a bug? Email us — we read everything.
Contact SupportOnly on your device. SignFast has no cloud and no account — documents, signatures, and form entries never leave your phone. See the privacy policy.
No. SignFast is free to try (3 clean exports per month) and a single one-time purchase unlocks unlimited use forever. No subscription, ever.
Open Settings → Restore Purchases inside the app while signed into the same Apple ID you bought with.
Go to the Signatures tab → Create New Signature. Draw with your finger, type your name, or photograph a signature on paper. Tap a saved signature's star to make it the default.
Yes. Native PDF form fields are detected automatically when you open a document. For flat (non-interactive) PDFs, tap Find fillable fields in the editor and SignFast will detect lines and labels on-device.
Exports are flattened: signatures and filled fields are burned into the page so nobody can move or edit them afterwards. That's what makes the document safe to send.
Delete a document by swiping it in the Documents list, or delete the app to remove everything. There is nothing stored anywhere else.
Read the full Privacy Policy.