FriendCaller /ˈfreɪndkaʊəlr/ is a Video and Voice over Internet protocol developed by C2Call GmbH based in Werl, Germany. Its proprietary Voice-Over-Internet technology was originally created by Michael Knecht and Martin Feuerhahn. It was a first prototype developed by Actai Networks GmbH in 2007; the technology was then transferred to C2Call GmbH in 2008. Later on, FriendCaller was launched in 2009 as a website and as an iOS (iPhone, iPad, iPod touch) app.
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