It’s an app that lets you learn a language as you play. If you’re familiar with the concept of language immersion, you’ll feel right at home with Ruby Rei. 

What is it about?

In Ruby Rei, the player controls two characters: Ruby, the main character, and her companion, Hugo. The game starts with the characters in a strange and surreal world. It is an adventure world, full of puzzles, mysteries, and weird and wonderful characters. The world is the product of the player's imagination, and the main goal of the game is to find the way back home and save the characters' friends. 

The gameplay is based on building relationships, solving puzzles, and making connections with the people you meet. It is a game where the player learns a language as they play. 

The app has no tests, no grammar lessons, no vocabulary lists to learn, and no time limits. The game allows the player to enjoy the experience and learn a language at their own pace.