Apple raised the ante for cameras in flagship phones with the announcement of its iPhone 7 and iPhone 7 Plus. Others already have taken the dual-camera approach to smartphone photography — notably HTC, LG and Huawei. “While it’s not the first dual camera mounted in a smartphone, it’s on par with the others in terms of basic functionality,” said Gartner analyst Brian Blau. Apple has added its own powerful twist to the concept. “Apple has updated the camera app to make using the dual camera easy — and that could be their best feature.”