Not working

I was using this app for 8 months and I loved it: very clean design, simple, no ads. The only thing is you never know if your app will open today or not, I guess it had its own schedule . Like right now I dont know what kind of bugs they fixed , but the app says: error 500 and doesnt open for week. So I cannot check when is gonna be my period, this is pretty lame .

Kate280488 about 月月佳－月经日历（经期、大姨妈助手）, v3.6