I like this App!

Tandem is a good App for people who want to learn languages and talk people over the world.
We can chat and do video calls casually.
Although Ive used other simular Apps,Tandems great point is that we can easily call someone than other Apps.

ゆい꒰•̫͡•ོ꒱ about Tandem: Conversation exchange, v1.2.1