Show Shutter Plus App sharply capture the stationary elements of images while blurring, smearing, or obscuring the moving elements.
When a scene includes both stationary and moving subjects (for example, a fixed street and moving cars or a camera within a car showing a fixed dashboard and moving scenery), a slow shutter speed can cause interesting effects, such as light trails. Long exposures are easiest to accomplish in low-light conditions, but can be done in Slow Shutter Plus App. Three Modes: Auto Blur, Night Scene, Light Trails
This app usually retails for $0.99/£0.69 but today you can pick it up for free. Click here to download.