Apple might have kept iPhone sales surprisingly strong in the March quarter this year, but things might be starting to cool off now that it has been six months since Apple last released a new iOS device. According to Net Applications, which measures global market share by monitoring traffic across its various networks, Apple’s combined iPhone and iPad market share dipped to 51.11% in April from 53.29% in March. The drop-off in iOS usage made Apple the biggest loser of the month, with only Symbian having also lost share. Meanwhile Android gained more than a point in April to climb to 37.75% from 36.58% in the prior month. Even BlackBerry showed a slight gain in April, inching up to 1.20% from 1.13% in