Similar to Flinto? https://www.flinto.com/
Looks promising. Though it would be a great start, I hope it goes beyond basic sliding transitions. Looking forward to it!
Yeah, the first thing I noticed about every transition in the video is that. Slideshow essentially, hopefully it's high on the list to add other transitions, then... new video.
Can't wait to give it a try.
This looks awesome.
Video introducing Briefs for Mac and iOS.