# Assinatura — Sign PDFs with no internet

> Sign PDFs with no internet (iPhone/iPad app by Marlon Alcantara.)

- Source: https://appshunter.io/ios/app/assinatura/id6821411022 (this page in markdown: same URL + `.md`)
- Developer: [Marlon Alcantara](https://appshunter.io/developer/1896005622)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 16.4 · 38 MB
- Languages: American English, Brazilian Portuguese
- Released: 2026-10-13
- Data updated: 2026-10-15

## What is Assinatura?

Sign PDFs on your phone with your real signature. Pick the document, take a photo of your signature on paper, and Assinatura places it on the right spots, looking like blue or black pen ink — ready to print or send.

Everything happens on your device, with no internet: the PDF, the signature photo and the signed document never leave your phone.

• Finds the signature places by itself: signature lines, "Signature:" fields, names and roles such as Tenant, Landlord or Client, and signature fields in PDF forms
• Witness lines are recognized but stay off until you turn them on
• Cleans up the photo: removes the paper background, shadows and specks, keeping only the stroke, with transparency
• Blue or black ink with a natural stroke: each signature gets small variations in size and tilt, like one made by hand
• Optional initials on the other pages, in the bottom-right corner, clear of the footer
• Drag, resize, delete, or tap anywhere to add a signature
• Keeps the original PDF: text stays sharp and searchable
• Share the signed PDF with any app (messaging, email, cloud storage) or print it directly
• Open PDFs from other apps with "Open with" / "Share"
• Your signature is kept only on this device for next time — and can be deleted whenever you want

No account, no ads, no subscription.

Important: Assinatura places the image of your handwritten signature on the document. It does not create certificate-based digital signatures. Check that the recipient accepts documents signed this way.

Privacy policy: https://cog.ia.br/apps/assinatura/privacy

Published by COG.IA.

## Is Assinatura safe?

Not enough ratings yet to assess Assinatura.

## Is Assinatura legit?

Assinatura has limited verification signals. The AppsHunter Legitimacy Score for Assinatura is 50 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0.0 — 2026-10-13

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-15.*