Gradler will automatically take photos on interval (or any user preset interval) without you having to hold the camera, just like a physical photo booth. Most native timer apps do the automatic part but they all only take one shot. Time-lapse apps do not allow users control of the interval and the individual stills are very low quality, nowhere near a regular photograph. With Gradler, you will be able to set your phone on a tripod and have it take photos on interval, just like a physical photo booth.