Connection issue

I think the app looks good but they need to work on the connection. When i click on anything it keeps me waiting for 15 sec +.
I cant image using this on the field where can be limited connection. Using realtime request to server is not really good choice. Please make the app to do everything lokally and maybe sync with server once a day or something . Maybe async communication ? But now not reallu practical

Fkbart about GNPlus GolfScoreManage-Videos