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)