Application to be used with mac mini

I'm a total newbie at this and am trying to figure out what application to use to communicate with my "headless" mac mini with iphone and i-pad. Thanks for any assistance in this.
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Remote from the app store works great

Good Listening

OK, I tried to configure that. Thought it would be easy but so far no go. Perhaps I'm just not that used to mac products. More of a PC person. I'll give it another go this evening. I did set up VNC and that was a snap.
Look at some of these.