I made this app to help non-native Chinese learners "tune" their ears to the different tones in Mandarin Chinese. Unlike English, Chinese is a tonal language. This means the same syllable can have a totally different meaning based on the pitch used to pronounce it. For example, ma could mean either mother or horse — and it's certainly important to not confuse your mother (mā) for a horse (mǎ)! Ka makes learning tones fun. The word Ka means "card" in Chinese — and the interface of the app is as easy as swiping cards either left or right. Check it out and tell me what you think!