Precorder Ensures You Never Miss a Moment with your iPhone’s Camera

iPhone: Say you're trying to take a video of your cat doing something hilarious. You could risk missing the moment by waiting until something happens to hit record, or you could use Precorder.

via Lifehacker: http://lifehacker.com/5992030/precorder-ensures-you-never-miss-a-moment-with-your-iphones-camera

The concept of Precorder is simple. You open the app, and it starts recording video automatically in the background. Once you hit the record button, the last several seconds of footage will automatically be prepended to everything that you record