All dads think they're masters of the grill, but most need help — help that they will never ever ask for. Download the iPhone's Grill Guide and your dad can quietly measure the thickness of a chicken breast or rib eye steak with the digital ruler, and then look up how long the meat should be grilled for and at what temperature. There are ninety-five foods on file including ground lamb, salmon and even fennel and pumpkin. (Grill Guide, $.99)