Works perfectly and seamlessly on my Samsung Galaxy S2. Very useful. The autostart feature works brilliantly. Would like it to start completely invisibly but it does start as process in foreground, not a problem as can dismiss it with a press of the back key.
It’s saved me from several lapses in concentration. I’ve checked my speed, and sure enough, there was a Camera Van around the corner. If you are an HGV or PCV driver, you’ll find this app very useful. I know I do.