Tandem app is formally released on the Android platform presently, although it has been quite softly launched the online services in September and on iOS it made its appearance since February 2015. But it started working in fall 2014. The active users of tandem application are up to 1.2 million at the moment (more than 1.5 million downloads occur each day).
The co-founder of company Arnd Aschentrup told that the platform is presently supporting 148 languages, including 11 symbol languages and some less conservational one like emoji, Dothraki and Klingon.
