CallSign
CallSign is a real-time, AI-driven identity and authentication SDK that confirms user location.
Its primary SDK category is User Authentication and it's used by Android apps.
Based on downloads over the last 30 days, the most popular 
Android apps that use CallSign are:
Looking at the number of Android apps that use CallSign, it's Not Popular among Android developers.
In addition, this month, CallSign has been…
- Added to 137 Android apps.
- Removed from 5 Android apps.
It's most commonly used by Android apps in the following categories: Finance and Business.
SDKs that are similar to CallSign:
- Sendbird Calls in the Communication category
- DocuSign in the Payments and Commerce category
- Spirit DSP Mobile Video Call in the Communication category
- Google SignIn in the Social category
- OAuthSwift in the User Authentication category
- AppAuth by OpenID in the User Authentication category
- BlockID by 1Kosmos in the User Authentication category
- Facetec in the User Authentication category
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