With 400 million Indian users, China-based content-sharing app SHAREit was the most downloaded tool app in the country in 2018, said a new report by mobile data and analytics provider App Annie on Monday.The app offers transferring speed faster than Bluetooth and even NFC, and it is totally secure, considering the type of connection it uses to transfer files. Prior to SHAREit or similar applications, the only best method for file transfer was either through Bluetooth, or USB drives.