Chinese (Simplified) or Chinese (Tradition), which language is used as Most popular language in China? I have an iOS app. I want to do localization of the app in Chinese language. But, in language settings, there are two options Simplified and Tradition. I' m not able to figure out which is the best one.

Please any one could tell me, which language, shall i use for Localization of my App ?

Thanks in Advance.
Simplified Chinese is used throughout mainland China, though pretty much everyone can read the Traditional also. Traditional Chinese tends to still be used in places like Malaysia, Singapore, etc.

If you're marketing to mainland China then you probably want Simplified.

Alternatively, do both.