Line vs WeChat

Mobile messenger app with various stickers and free voice & video call over 3G/4G & Wi-Fi.
WeChat is a free messaging & calling app that allows you to easily connect with family & friends across countries. It's the all-in-one communications app for free
Face to face in the news:

2016 - WeChat adds VoIP international calls - a new advantage over Line

Popular messaging app WeChat, which is owned by Chinese Internet giant Tencent, is taking on Skype by launching an international telephone calling service. The service is initially available for users based in the U.S., Hong Kong and India, but it will roll out to others over time. ‘WeChat Out’ is different from the existing calling options inside WeChat (voice and video) because it allows for calls to actual phone numbers (mobile and landline) rather than just to fellow WeChat users. WeChat is gifting its users an initial $0.99 in credit (which it says will allow up to 100 minutes in calls) to get things started, although it hasn’t revealed the cost of calls once that freebie has been eaten up.