This COULD be a great App

I love the information this app gives. I bought the pro version. There are issues signing in to the App. After the first sign in, sign in no longer works and the only way to sign in is to delete and reinstall the app. There is NO customer support...I sent several notes and have gotten no response. I am hoping these issues are resolved, because I really would love the app to work.

Maximum Fun! about Wisuki - Wind and Waves