I realized that there are some applications which size keeps growing after every use without purposly saving anything with it. For example when I installed an internet radio listener app, its size was some MB and after some hours of use it grew to some hundred MB. I reinstalled the app so it has the starter size now, but as I see it keeps growing again with use. What can I do for it to keep it's original size as I use it? Deleting temporary files didn't help.