LingoDeer is an app that helps you learn Japanese, Mandarin, or Korean, as long as you're already fluent in either English or Spanish. Obviously, learning any language is a long, hard process, but not without great rewards. If you spend enough time interacting in the language you're trying to pick up, soon enough you'll notice how you make progress little by little.
First things first, you're going to need to install the app and pick which language you'd like to work on. From there, choose your base language. Once your selection is made, simply start one of the courses included within the app and you'll be on your way to learning basic Japanese, Mandarin, or Korean by working on entertaining exercises that are easy in the beginning, but progressively increase in difficulty.
The kind of exercises you'll find on LingoDeer is quite similar to the ones on Duolingo (another very popular language-learning app). At times, you'll have to write out a word, and other times you'll have to listen and transcribe. That said, there's a lot of different kinds of word puzzles to do so you won't be getting bored any time soon.
LingoDeer is an excellent app when it comes to brushing up on your Japanese, Korean, or Mandarin, or even picking up one of these languages from scratch.