i wish there was a app or website where you could enter all your special lands you own and then your cards you want in the deck. and then it would tell you which special lands your best off useing. there isnt one is there???? i mean just mana symbol wise. especially for more then 2 colored decks and lands

The closest thing I know of is ManabaseCrafter. You pick an EDH general, and it shows you ALL the special lands that are in that general's colors.