3 ' s ▁iPhone ▁ 5 S . ▁Touch ▁ID ▁has ▁been ▁used ▁on ▁all ▁i P ads ▁since ▁ 2 0 1 4 ' s ▁i Pad ▁Air ▁ 2 , ▁with ▁the ▁exception ▁of ▁the ▁third ▁and ▁subsequent ▁gener ations ▁of ▁the ▁i Pad ▁Pro , ▁where ▁it ▁has ▁been ▁dis cont in ued ▁in ▁favor ▁of ▁Face ▁ID . ▁In ▁ 2 0 1 5 , ▁Apple ▁introduced ▁a ▁faster ▁second - gener ation ▁Touch ▁ID ▁in ▁the ▁iPhone ▁ 6 S ; ▁a ▁year ▁later ▁in ▁ 2 0 1 6 , ▁it ▁made ▁its ▁laptop ▁debut ▁in ▁the ▁Mac Book ▁Pro ▁integrated ▁on ▁the ▁right ▁side ▁of ▁the ▁Touch ▁Bar . ▁In ▁Mac Book s , ▁each ▁user ▁account ▁can ▁have ▁up ▁to ▁three ▁finger print s , ▁and ▁a ▁total ▁of ▁five ▁finger print s ▁across ▁the ▁system . ▁In ▁ 2 0 1 7 , ▁Apple ▁released ▁the ▁iPhone ▁ 8 ▁and ▁ 8 ▁Plus ▁with ▁Touch ▁ID , ▁alongside ▁the ▁iPhone ▁X ▁that ▁instead ▁incorpor ated ▁Face ▁ID . ▁ ▁In ▁ 2 0 2 0 , ▁Apple ▁announced ▁the ▁return ▁of ▁the ▁classic ▁Touch ▁ID ▁sensor , ▁this ▁time ▁on ▁the ▁iPhone ▁SE ▁( 2 nd ▁generation ), ▁which ▁has ▁a ▁similar ▁design ▁to ▁the ▁iPhone ▁ 8 . ▁This ▁is ▁the ▁first ▁iPhone ▁to ▁feature ▁Touch ▁ID ▁since ▁the ▁iPhone ▁ 8 ▁and ▁ 8 ▁Plus , ▁both ▁released ▁in ▁ 2 0 1 7 . ▁ ▁F inger print ▁information ▁is ▁stored