Use high speed photographs to evaluate your tennis swing, observe fast events in nature, or physics (bouncing balls, dropping feathers). App has no ads and uses very little space on your phone (61K).Press the START/STOP button to start collecting high speed photographs; press again to stop. After stopping, the photographs are immediately viewed using the regular camera Gallery application that comes with the Android device.Using the USB cable, photographs are downloaded to your PC from the HighSpeedPhotography subdirectory on the SD card. Photographs are collected about every 1/10th of a second. There is a short delay while the phone sorts the photos for the camera Gallery application.The CameraPreview window may appear stretched and rotated 90 degrees in some devices. This is because the software has been written to be backward compatible with very old smartphones. Nevertheless the photographs will be normal. Paid version notes:The