Flashlight (iPhone 4) for iOS

Flashlight for iPhone 4 (exclusively) is one of many new light-giving apps in the iTunes App Store that specifically take advantage of the new flash on the device. Though there have been many flashlight apps released in the App Store in the past (often turning your screen white for limited illumination), this app uses the LED flash on the back of your iPhone 4 as a light. The interface is dead simple: Flashlight for iPhone has one button that turns your LED light on and off and comes with settings to create a strobe and some other simple options.

Flashlight for iPhone 4 is only one of many new apps that use the LED light on your iPhone 4 (most go for 99 cents, as well), but it seems to be the simplest "switch" for the hardware LED light. The on and off button has been changed in later versions to just the button on screen rather than the whole screen, so you can avoid accidentally turning your light off in older versions. Obviously, using the LED light continuously sucks up your charge, so use it sparingly. Even with these issues, just about anyone needs a good flashlight from time to time, and this one is both reliable and easy to use.