App not working!!!

Having trouble with the app earlier today it wasnt letting me enter it thinking it was my phone I shut it off & back on again still didnt work so I uninstalled it to reinstall it & it wasnt letting me sign in so I tried creating a new account & still no luck! Please fix the app its actually a very good & helpful app.

Mrs. Santiago22 about 月月佳－月经日历（经期、大姨妈助手）