Thread:Stray Bird/@comment-28048698-20170613021249/@comment-27971189-20170712132246

Cache clearing only clean up all 'junk' data left by events, gacha, etc. Its useful if your app size became too big, like more than 2 GB. Its feature that some people have been waiting.

If you clear cache, you need to download some game data. The amount of data surely depends on your progress and corresponding event by that time.