Propersh LLC

Playing chess endgames is a very important and efficient way to improve one's chess skills. But

Chess opening is very important for a chess game. There are lots of apps to help one study chess ope

An app to help learn Chinese characters and classics, like 诗词，成语，寓言故事.

Most of us own bluetooth speakers, but not bluetooth microphones. Often we wish we could use our blu

A vocabulary builder for kids. The app will make it easy to build up a kid's vocabulary. It will

Learning Chinese is hard, and the lack of right tools makes it even harder. One problem with learnin

Help users to improve by studying chess openings and endgames.