Iran’s state television urged people to delete WhatsApp, saying without evidence that the app was sending user information to Israel.

© Abedin Taherkenareh/EPA, via Shutterstock

The war strategy game allows players to represent fighters from Taiwan, Hong Kong and other places in plots to overthrow China’s Communist Party.

© Associated Press

Moscow has long been suspicious of foreign messaging apps. WeChat’s weak encryption makes it vulnerable.

© Pavel Bednyakov/Associated Press