I have downloaded Katra's Weather HD (not v2, i don't like v2), but i got some questions that i hope some of you can answer;

How to make it update just every 30 mins, and remember the weather from last update (mine updates every time i wake up the phone), or
make it update only when connected to wifi (i have disabled edge)?

How to delete/hide/disable the text (city, temp. and weather)?

I have added a screen print of how it looks now.