Hi guys. So we have a new version up. Sorry it took a while.
This version fixes the video capture to 30fps. Apple's capture engine was unreliable that sometimes the resulting video could be anywhere from 24fps to 30fps. Now Catchin' Sync measurements are more accurate.
There's also a device offset field now in the settings, where you can enter the known device offset to compensate for the outcome.
The current list can be found here
I will put other devices as I get to test them, but for now it's only the listed ones that are tested.