to Statista, there are 260 million monthly active users as of January 2019. The Viber messenger is very popular in Greece, Eastern Europe, Russia, the Middle East, and some Asian markets. India was the largest market for Viber as of December 2014 with 33 million registered users, the fifth most popular instant messenger in the country. At the same time there were 30 million users in the United States, 28 million in Russia and 18 million in Brazil. Viber is particularly popular in Eastern Europe, being the most downloaded messaging app on Android in Belarus, Moldova and Ukraine as of 2016. It is also popular in Iraq, Libya and Nepal. As of 2018, Viber had an over 70 percent penetration rate in the CIS and CEE regions, but only 15 percent in North America. Russia Viber is one of the more popular messenger applications in Russia. In January 2016, Viber surpassed WhatsApp in Russia, with about 50 million users. Ukraine As of September 2021, Viber is Ukraine's most popular messaging app, with a market share of 97.7%. 20% of the company's total messages sent came from Ukraine, where users sent 97.5 billion messages in 2021. Bulgaria Viber's market share in Bulgaria is steadily increasing. Reaching a record 90% in 2021. The number of calls made and messages sent via Viber in Bulgaria rose by 11% in 2021, reaching approximately 530 million calls and an average of 400 messages per second, according to data presented by the company. Greece As of the end of 2021, over 90% of people in Greece have Viber on their phones, making it the top messaging app in the country. Serbia Viber is the top messenger in Serbia. As of November 2021, over 90% of Serbians have Viber on their phone. Applications Platforms Viber was initially launched for iPhone on 2 December 2010. It was launched on BlackBerry and Windows Phone on 8 May 2012, followed by the Android platform on 19 July 2012, and Nokia's Series 40, Symbian and Samsung's Bada platform on 24 July 2012, by which time the application had 90 million users. In May 2013 with Viber 3.0, a desktop version for Windows and macOS was released. In August 2013, Viber for Linux was released as a public beta and in August 2014 a final version. In June 2016 a UWP-based desktop application for Windows 10 was released in the Windows Store.