Put your iPhone 4's LED flash to use for reading menus in dimly lit restaurants or just making sure you don't trip over the cat on the way to the bathroom at 4 am. The main screen features a large Maglite-esque on/off button for a continuous beam. It can also produce a strobe effect and even a flashing Morse code SOS.
WIRED Compose in-app emails and texts without having to turn off the light. Lock the screen to prevent inadvertent touches.
TIRED Flash turns off when you switch apps.