Oooooh my gosh. Read reviews and blogs before downloading. Everyone will tell you this is garbage. After hours of very buggy, frustrating editing, it would not export the video without throwing audio out of sync. Looking this up, it's apparently been a problem since the app was made and there have been no solutions. My final solution was to export without audio, download a different editing app, bring the video from Rush to the new app and add audio. So many wasted hours.