Signal (software)

==2015–2020==
==2020–present==
==External links==
Category:Software
Category:IOS apps
Category:Android apps
Category:VoIP services
Category:Free software
Category:Videotelephony
Category:Instant messaging
Category:Social networking
Category:Secure communication
Category:Cross-platform software
Category:Cross-platform free software
Category:2010s
Category:2015