A real flash light for iPhone 4 with amazing features, The app is continuous that mean it dont need for preferences. The main features is to toggle the flash ON/OFF and there is a quick toggle, BUT the best part is the "Party" button, this feature uses iPhone built-in microphone to calculate the music beats in realtime to generate a club flashing light (Strobe) syncs with music beats, until now there is NO app to generate a real strobe, but i spend all my time to make it happen