If you're an iPhone owner with [insert carrier here] and happen to constantly find yourself raising your phone to the heavens in search of cell reception in certain areas (i.e. the building you work in, even your home; a specific location that you spend plenty of time at and need cell service), then you're in luck. A new app called CarrierCompare plans to help people find the best iPhone carrier for them, at least based on cell reception in your precise location.