Recently, we received feedback from some of our users that this application may crash when opened with an iPhone4S loaded with iOS6, iPod Touch 5, and occasionally iPhone 5. Our engineers found out the crash problem is often due to memory issues on your device. If you have applications running in the background, that could be using up a lot of your phone's memory, causing Blux Camera to crash. Try turning off your device and turning it on again to reset the device's memory. To reset your iPhone, simultaneously hold down the home button and the power button until the Apple icon appears on the screen.
You iPhone is a computer. To help keep it running smoothly, rebooting should be a regular part of your iPhone's maintenance.