This app helps you to record videos in MP4 Format which is lighter than iPhone's inbuilt Camera's Format i.e (.MOV), You can also convert other format of video to the MP4 Format.This helps you to save memory by reducing size in video recording. You can use this app to record video or convert video in MP4 Format(MPEG-4). A file with the .mp4 file extension is an MPEG-4 video file format. MP4s are one of the more common video file formats used for downloading and streaming videos from the internet. It’s a highly versatile and compressed video format that also can store audio, subtitles, and still images.