HewasresponsiblefortheskeuomorphicinterfacefeaturedearlyoniniOS, andthecalculatorappincludedwiththeiPadprototypewassimply a scaled-upversionoftheiPhone's.
Forcinguserstodownloadthird-partysolutionsfromtheappstore, mostofwhichhadadsandprovided a worseexperiencethansimplyincluding a scaled-upversionoftheiPhonecalculator.