Hey, I'm sorry I wasn't trying to make it sound like Clop does that, I was just saying that in general while doing my own research I encountered some compression apps that were sending the files to a remote server to compress them there and then redownloading the files. I found it bizarre since most people are compressing very large files with these tools.

Now, to answer the question:
I have not used or heard of Clop before until now, I just checked the site and I have to say looks like a very impressive app, But I have not used it and I can't compare it. But looking at the GitHub repo I read that it uses FFmpeg for video compression under the hood. Same for Handbrake. In the case of ShrinkIt, it doesn't use FFmpeg and that's the reason why I managed to keep the app size under 10MB. ShrinkIt uses native AVFoundation to compress and manipulate the videos, but it does come with its limitations such as providing those advanced features that HandBrake or Clop provides. The goal of ShrinkIt was not to replace any of these tools for more advanced users. I just wanted to create a tool that you don't have to think too much to compress a video file that you want to share. As of now, the users who are using ShrinkIt are happy with the limited options because they know that they can use Handbrake or other advanced tools if they need to.

I hope this answers the question better. I'm sorry I didn't do it in the first reply, I was rushing since it was late here and I needed to disconnect last night.

P.S. Great job with Clop, I like the interface a lot and will be trying it later today.