PS: All Cydia apps require iPhone to be Jailbreak.
This app is the single most important reason I jailbreak my iPhone. It’s a dead simple program. All it does is show a white screen at maximum brightness with strobe capability to attract attention. To date there isn’t any flashlight from App store that does the same because Apple restricts any apps from accessing and make changes in iPhone settings. There are those that can change colors, light bulbs, strobe, stripes, etc, but all have one common trade off, the brightness stuck at user set level. Which means if you want to get the brightest flashlight you will have to go into settings -> brightness, tune it to max, exit settings, only then turn on the flashlight app, which is impractical being flashlight are for emergency use.
Note: This post is written entirely using iPhone.