Some really fun apps are:
Hello talk (free): You can join a feed with French people wanting to learn your language. You can message back and forth, and correct each other's sentences.
Memrise: This app has many features such as native speakers, listening exercises, etc.β
Thanks for the apps, I wanted to ask about this question in the post but I decided to not mix up subjects)) anyway, great to know, I'll try them and I'll tell my students to try.