iPhone Screenshots


Please note, this app will not work unless your employer is a Callsign customer, and they have asked you to download this app.

Thank you for using Callsign, we are passionate about keeping your identity and data secure. You can use this app to securely sign into your organization's Callsign protected applications.

To get started using the Callsign app, download here, and follow the step by step instructions. It should take 3-5 minutes.

If you have any questions please contact your IT Service Desk, or use the in-app support instructions.

And if you want to chat, please contact us on Twitter @callsign.

What’s New

Version 4.13.7

Bug fixes and performance improvements

Ratings and Reviews

2.7 out of 5
6 Ratings

6 Ratings

Mr Toner ,

What is this?

I was looking for an app to replace physical business cards when I ran across this app. I don't think it's what I want, but — sadly — I don't know what this app is for.

The developer's website is nicely done; however, it could use some "real world" use cases to give (potential) users a better idea of how to use their app.

EMS User ,

Improves security immensely.

Great security product.


Callsign Inc
47.8 MB

Requires iOS 9.0 or later. Compatible with iPhone.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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