Our native crab apples is Malus sylvestris
, and domestic apples are Malus domesticus
. But it's complicated by several other crab apple species that may have been introduced, and by the rather promiscuous natire of them all and the possibility of hybrid crosses.
If they're small and probably a bit woody fleshed, I'd go with crab apple. I'm not sure there are any apples that could be descrobed as wild.. feral at best
Well done for finding them, my usual trees haven't done very much this year.