This app will turn your smartphone into a stroboscope. You can select the speed from 0 to 50hz. 0hz will be like a torch.
You can see the effective speed of the strobe. Because depending on your smartphones hardware, your device may be to slow, to reach 50hz.
Also you can turn the light and the sound on and off. So you can use flash and sound, only flash or only sound on the selected frequency.
This app will give you real party feeling, but brings a lot of fun, if you just want to needle your parants or your friends.
This app is very simple to use.