Research by DI Marketing has found that the home-grown app Zalo is the most popular messaging app in Vietnam. 80% of smartphone users in Vietnam have Zalo installed on their phones, ahead of Facebook Messenger which comes in at second place with 73%. Viber and Skype are used by around 4 in 10 Vietnamese smartphone users, with Line being used by around 2 in 10, and Yahoo and Tango being used by around 1 in 10. The research also revealed that different apps are more popular with different age groups. Zalo and Facebook Messenger are more popular with younger users, whilst Yahoo and Viber are more popular with older users. Different age groups also use the apps for different purposes. Younger users are more likely to use messaging apps as a chat room, whereas older users are more likely to use them as a news source.