Having quick access to your iPhone's LED flash is always convenient, and that’s why Apple built their own Flashlight toggle into iOS when they introduced Control Center with iOS 7. But now, you can make accessing the flashlight even easier.
A new free jailbreak tweak called QuickFlash by iOS developer Ziph0n adds a flashlight button to the bottom right of your Lock screen, allowing you to turn on the flashlight with just a tap.