The iPhone 4 is considered by many as the biggest leap in the advancement since the Apple smartphone's inception back in 2007. A completely overhauled, high-end design was accentuated further by the introduction of the Retina display, and belatedly perhaps, the camera was given an uber-bright LED flash. A complete win. Typically of Apple, the flash feature felt slightly unfinished, since while some apps allow the LED to operate in torch mode prior to the taking of a snap, Apple's native Camera app does not offer this facility. Luckily, there's a tweak for that, and it goes by the name of PhotoTorch.