Callsign Inc

3.3
153 reviews
10K+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image
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About this app

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.
Updated on
Nov 3, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location, Personal info and 2 others
Data is encrypted in transit

Ratings and reviews

3.3
153 reviews
Connor Glennon
August 4, 2022
Unusable. Asks for my CallSign then name, email and phone. Checked multiple times for input errors but when I proceed to the next step to setup pin it fails with the most useless message I've ever seen. Paraphrasing, "entered value invalid". No highlighted field. No indication in the error message which field. Knowing some apps it's probably an API issue and they just threw up that message. I tried my number with or without an '0', I tried my email with capitalisation and all lower.
6 people found this review helpful
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Callsign Inc.
August 5, 2022
Hi Connor, sorry to hear you're having issues registering in the app. Please contact support@callsign.com (including your organization name) and they'll be able to help.
Edward
September 10, 2025
Doesn't work. I tried creating a new call sign and absolutely nothing worked. I mashed random letters from my keyboard about a dozen times to even find one that worked. Massively wasting my time as this is something my company has decided to integrate with for access to some systems
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A Google user
April 2, 2020
Unstable, extremely slow...in all a useless application. 9 out of 10 times, you wont get a punsh notification on your phone. You have to open the app and refresh to get the incoming request. For the past few days, even opening the app says check internet connection. I dont understand how big enterprises can deploy such a pathetic app in to their eco system. Have you guys tested your app? Edit: I can conclude that this is the worst app I have ever used in my life...it sucks and big time
8 people found this review helpful
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Callsign Inc.
May 4, 2020
Hi Shakun, I'm sorry to hear you're having trouble with the app. If you could contact our support team directly (support@callsign.com) with a little more information they will be more than happy to help you.

What’s new

Updated the application to be compatible with newer Android versions

App support

About the developer
CALLSIGN LTD.
support@callsign.com
Chancery House Chancery Lane 5/5 LONDON WC2A 1QS United Kingdom
+44 20 7661 7800