Comparison

PC vs Salt mSign

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

Head to head
About

PC

Send and receive faxes globally from your mobile device. Convert documents, photos, or text into faxes, and even send real letters within Germany. Also supports sending SMS messages.

Highlights
  • Send and receive faxes worldwide
  • Photo-fax and text-fax options
  • Send real letters (Germany only)
  • Send SMS messages
  • Cloud document integration
  • Custom digital stationery
Features
Read full description

The communication-center by PC-FAX.com is the professional version of PC-FAX.com FreeFax and turns your iPhone or iPd-Tourch into a communication genius. Fax are outdated? As if! A fax is the "fastest letter" for legally binding commercial operations and thus it is "in"! Sending and receiving fax Send fax from every place in the world to every place in the world as photo-fax, text-fax or document out of your document-storage (iDisc, Dropbox or GoogleDocs). Receive fax from every place in the world with your own fax-number. Registration required To use the communication-center, you need to register with FAX.de or PC-FAX.com. During registration, you chose the number for receiving fax. You can buy low-priced credits for sending fax or a subscription at a bargain price. Activate the communication-center with your account-number and your password. Photo-fax, text-fax Take a picture of a document with your iPhone and send the document as a fax. Superb quality with good lighting is guaranteed. Or just send a text as a fax. Sending real letters With this function you can send real letters (only available in Germany). For this, you take documents from the cloud or enter the letter directly on your iPhone or iPod-Touch. You can even configure your own "digital stationery". Sending SMS with an iPod-Touch You can now send SMS directly from your iPod-Touch. Photo-PDF Take a picture of a document with your iPhone and send it as a pdf-attachment to an E-Mail-Adress. This function is free for all time.

About

Salt mSign

Features
Read full description

Salt mSign is a mobile security MFA token for authentication of the user identity during login and authentication/verification of transactions after login. Salt mSign is ‘connected’ in that the authentication responses are returned directly to the authentication server thereby enabling authentication that is independent of the delivery channel that initiated the request. What can Salt mSign do? - Connected Biometric 2FA Login for User access via RADIUS, Microsoft ADFS, SAML Federated Login for cloud, Shibboleth and Browser-based Web Applications. - Multi-Factor Authenticator (MFA) for all the organization’s Mobile Apps Supporting Multiple Methods of Sign-In & Authentication Independent of the service delivery channel. - Single Authenticator for all the organization’s Mobile Apps Supporting Multiple Methods of Sign-In & Authentication via Inter-App. Typical Uses: - Mobile Soft Token used for 2FA Biometric Login to Internet Banking, e-Government Portals, and Corporate Online Services. - High-Value Transaction Signing with WYSIWYS (What You See Is What You Sign). - Biometric MFA Login for Remote Network Access: RADIUS, ADFS, Shibboleth. - Authentication for other Mobile Apps on the same device. - Quorum Approvals and Advanced Workflows with separation of duties where the Initiator of Payment Instruction is not authorized to approve; with multiple Authorisers. - Hardware Token replacement. - Card Not Present Payments, 3D Secure support. Salt mSign requires you to register your App. Please contact Salt Group for registration information. Features include: - Biometric Sign-In with TouchID, FaceID or PIN - Rich Content and free-form payload information - WYSIWYS (What You See Is What You Sign) - Inclusion of supplementary user input - Signature code returned via the mobile network - Support for multiple signatories - Support for Public Key Cryptography; Salt mSign supports the use of symmetric and asymmetric keys in signing. - Figaro and secure QR code support for offline delivery of payload information: using the device camera to scan Figaro/QR codes that contain payload information for offline signing. - Enhanced Rich Content delivery of large payloads including the capacity for data formatting and payload content consisting of graphics images. - Issuer configurable profiles including PIN length, PIN retry thresholds, weak PINs, token display timeouts, Signature Code lengths, language support, issuer branding - Re-deployable in the field, anywhere in the world - Full browser independence - Familiar user interface

Screenshots

PC4 screens
Salt mSign3 screens

Verdict

The call

The clearest difference is in-app purchases: Salt mSign at none against PC's 9. PC's advantage is update cadence (every 6 weeks vs every 4 months) and device support (3 vs 1). On price and ads 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. PC sells 9 one-off in-app purchases. Salt mSign asks for nothing beyond the download.

UpkeepUpdate frequency

PC ships an update every 6 weeks, Salt mSign every 4 months. The most recent releases landed on September 30, 2026 and September 24, 2026 respectively.

Scorecard4 real differences · 6 level
PC versus Salt mSign: the parameters behind the verdict, then further details
ParameterPCSalt mSign
PriceFreeFree
Rating4.3 (7 ratings) — better—
Positive reviews61.3% of reviews—
Number of ratings7 — better—
Update frequencyEvery 6 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better16.4
Further details — not scored
Size49 MB53 MB
Age rating4+4+
DeveloperFax.de GmbHSalt Group

In-app purchases

9 purchases

PC

One-time9
  • Small$5.99
  • Medium$39.99
  • Large$99.99
Show 6 more
  • Fax number (Zone 1)$99.99
  • Fax number (Bulgaria)$149.99
  • Fax number (Zone 2)$199.99
  • Fax number (Switzerland/Poland)$199.99
  • Fax number (Greece)$229.99
  • Fax number (New Zealand/Mexico)$299.99
None

Salt mSign

No in-app purchases

Questions

Is PC free?
PC is free to download, with in-app purchases available.
Is Salt mSign free?
Salt mSign is free to download, with no in-app purchases.
Do PC or Salt mSign have ads?
Neither PC nor Salt mSign shows ads.
Which is updated more often, PC or Salt mSign?
PC ships an update every 6 weeks, and Salt mSign every 4 months. Most recently, PC was updated on September 30, 2026 and Salt mSign on September 24, 2026.

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