This app turns your iPhone 4 into a powerful LED Torch/LED Flashlight not only that but it also has information about light and includes a light wavelength calculator.
Very easy and simple to use aided with a simple layout.
Includes a strobe light for signaling, partying or whatever your creativity comes up with and wavelength calculator all for free.
Unlike many other on the appstore it is free.
Continued use of the flash my dramatically decrease battery life.
If you suffer from Photosensitive Epilepsy, we recommend you do not use the Strobe Mode as it uses flashing lights.