Comparison

Viafirma vs Adobe Acrobat Sign

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Viafirma

This platform enables secure authentication and digital signing using your device's digital certificates. It integrates with web applications that support its services and works with various official certification authorities worldwide. Manage multiple certificates and use different input methods for a seamless signing experience.

Highlights
  • Digital certificate management
  • Secure authentication
  • Digital signing
  • Supports multiple certification authorities
  • Stylus and smartcard support
Read full description

Welcome to viafirma, authentication and digital signature platform. This client allows you to make use of the digital certificates in your device with those web applications already using viafirma authentication and digital signing services. This application supports iPhone, iPad and iPod Touch. It works with most of the official Certification Authorities in Spain and other countries, such as FNMT, Firmaprofesional, Camerfirma or Izenpe among others. You can find out about them in the following link http://www.viafirma.com/en/information You can use as many digital certificates as you wish, all of them being easily managed, use different stylus (including the new Apple Pencil) and even use smartcards with any of our readers (more information about readers on http://doc.viafirma.com/viafirma-platform/anexos/smartcards.html

About

Adobe Acrobat Sign

This app allows you to easily and securely get documents and forms signed electronically from anywhere. It enables you to sign documents yourself, send them to others for their signatures, track progress in real-time, and even scan paper documents into PDFs for signing.

Highlights
  • Sign documents on the go
  • Send documents for e-signature
  • Track agreement progress
  • Scan paper documents to PDF
  • Offline signing capability
  • In-person signing
  • Legally binding and secure
Features
Read full description

Get documents and forms signed. Easily. Securely. Anywhere. This app is a mobile companion for the Adobe Acrobat Sign e-signature service. With it, you’ll get an electronic signature solution you can trust, from the global leader in secure digital documents for over 25 years. Adobe Acrobat Sign is used by businesses of all sizes — including Fortune 1000 companies, healthcare organizations and financial institutions — to accelerate critical business processes in Sales, HR, Legal, and Operations. Adobe Acrobat Sign lets you e-sign documents and forms, send them to others for e-signature, track responses in real time and get signatures instantly with in-person signing. It even lets you work offline and syncs automatically when you’re back online. SIGN DOCUMENTS ON THE GO •Open and sign documents instantly. •Easily read documents before signing with Reading Mode. •Sign directly on the screen with your finger or stylus. •Sign or click to approve a document sent by others. •Delegate signing to another person or reject a signing request. •Save partially filled forms to complete at a more convenient time. •Sign documents offline. Adobe Acrobat Sign syncs automatically when you’re back online. GET SIGNATURES FROM OTHERS •Send documents for signature from your online document library, your device or email attachments. •Work with documents from Google Drive, Box, Dropbox or Adobe Document Cloud. •Use your iPad or iPhone to get signatures in person when meeting a client. •Choose a language for the signer’s experience. STORE AND MANAGE YOUR DOCUMENTS •Track progress and manage agreements with real-time status updates. •Send reminders to people who haven't signed yet. •View agreements stored in your online account. •All parties get a certified copy of the signed document automatically by email. LEGALLY BINDING AND SECURE •Adobe Acrobat Sign is compliant with e-signature laws around the world, including the U.S. ESIGN Act and the European Union eIDAS Regulation. •Signed documents are encrypted and saved as Certified PDFs. Recipients can validate document authenticity. •Each transaction includes a complete audit trail detailing events and actions. Signer geolocation information can also be added. •Adobe Acrobat Sign meets stringent security compliance standards and is certified compliant with ISO 27001, SOC 2 Type 2, HIPAA and PCI DSS v3.0 used by the Payment Card Industry. •Adobe Acrobat Sign provides protection for both the sender and the signer during the signing process with identity verification options, an audit trail, a tamper-evident seal and more. SCAN DOCUMENTS • Turn any paper document into a PDF, then send for fast e-signing. • Scan multiple document pages into a single PDF and reorder them as desired. • Easily attach, send, and sign scanned PDFs. • Enhance your camera images with boundary detection, perspective correction, and text sharpness. Adobe Acrobat Sign for iPhone and iPad requires an active subscription with one of these Adobe offerings: •Adobe Acrobat Sign Solutions •Adobe PDF Pack •Adobe Acrobat DC •Adobe Creative Cloud Complete Terms & Conditions: Your use of this application is governed by the Adobe General Terms of Use (https://adobe.com/go/terms_linkfree_en) and the Adobe Privacy Policy (http://www.adobe.com/go/privacy_policy_linkfree_en). Do Not Sell My Personal Information: https://www.adobe.com/privacy/ca-rights-linkfree.html

Screenshots

Viafirma3 screens
Adobe Acrobat Sign4 screens

Verdict

The call

The clearest difference is rating: Adobe Acrobat Sign at 2.2 against Viafirma's 1.0. Adobe Acrobat Sign also leads on ratings volume (646 vs 1). Viafirma's advantage is monetization model (free vs free with in-app purchases) and review sentiment (25% vs 11%). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Adobe Acrobat Sign holds the better App Store score, 2.2 against 1.0. That said, the two scores are not equally well evidenced: Adobe Acrobat Sign has 646 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 25% of Viafirma's written reviews are positive against 11% of Adobe Acrobat Sign's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Viafirma ships an update every 3 months, Adobe Acrobat Sign every 2 months. The most recent releases landed on October 23, 2026 and October 26, 2026 respectively.

Scorecard4 real differences · 6 level
Viafirma versus Adobe Acrobat Sign: the parameters behind the verdict, then further details
ParameterViafirmaAdobe Acrobat Sign
PriceFreeFree
Rating1.0 (1 ratings)2.2 (646 ratings) — better
Positive reviews25.0% of reviews — better10.9% of reviews
Number of ratings1646 — better
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size6 MB140 MB
Age rating4+4+
DeveloperViafirma S.LAdobe Inc.

Customer experience

Viafirma

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews24 reviews
Positive25.0%
Neutral8.3%
Negative66.7%

Adobe Acrobat Sign

All ratings645 ratings
Positive27.8%
Neutral5.0%
Negative67.3%
Written reviews349 reviews
Positive10.9%
Neutral4.3%
Negative84.8%

Bugs and requests

Viafirma

Not enough reviews yet to summarise bugs or requests.

Adobe Acrobat Sign

Reported bugs

4 issues
  • Documents fail to load or send
  • App redirects to website instead of functioning in-app
  • Inconsistent behavior across iOS and Android
  • Signing process often does not work as expected

Requested features

5 requests
  • Integration with OneDrive and other cloud storage
  • Ability to resize signature/initial boxes
  • Offline signing capability
  • Streamlined login process
  • Improved notification system

In-app purchases

None

Viafirma

No in-app purchases

None

Adobe Acrobat Sign

No in-app purchases

Questions

Is Viafirma free?
Viafirma is free to download, with no in-app purchases.
Is Adobe Acrobat Sign free?
Adobe Acrobat Sign is free to download, with no in-app purchases.
Which has better reviews, Viafirma or Adobe Acrobat Sign?
Adobe Acrobat Sign is rated higher. Viafirma averages 1.0 out of 5 from 1 ratings, while Adobe Acrobat Sign averages 2.2 from 646 ratings.
Do Viafirma or Adobe Acrobat Sign have ads?
Neither Viafirma nor Adobe Acrobat Sign shows ads.
Which is updated more often, Viafirma or Adobe Acrobat Sign?
Viafirma ships an update every 3 months, and Adobe Acrobat Sign every 2 months. Most recently, Viafirma was updated on October 23, 2026 and Adobe Acrobat Sign on October 26, 2026.

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