I've been using this app for over a year, both paid and free model. The one thing that I have had a constant issue with is audio/video sync playback while playing the video. I vlog. Sometimes I like to align my cuts with music. It's an uphill battle doing it with this app as you never know if it's perfectly aligned as, every time you okay the video, the audio is out of sync in a by a few different seconds from the last. Now it can't even play already processed videos with mucking up the audio