The Pocket Radar app does a large amount of calculation to add in the black speed display box that you see in the videos. The built-in camera app does not have to do this extra “work” which results in videos that may look “smoother,” have more resolution, or have a higher frame rate. Generally, more powerful, higher end phones and tablets will produce better videos due to their increased processing power. We will continue to improve the quality of the videos in our future app releases.