Guide for Duolingo - Learn Languages for Free

Guide for Duolingo
I made this guide for my interests and share experiences with others.

My apps has some tips such as:
+ How can I learn multiple languages at the same time?
+ How can I skip the basics?
+ How do I delete a language from my profile?
+ What does my Fluency Score mean?
+ ...
If you have anyproblem about the application, please contact me at: [email protected]