Have only had a few minutes to play with my early access demo to Invision Studio, but finally sat down to kick the tires and I'm loving it. Having timeline controls directly in the studio space is incredibly useful. 

Here's an app sign in screen I've been toying with. I did the above design in two iterations over two days — the first phase, the layout and light interaction (going from landing screen to a single sign in screen) took about 90 minutes. The second phase (building out the additional three sign in screens, adding interaction between sign in screens) took another hour and change. I have one more phase to go, which should be another 90 minutes or so (adding a CTA by the input fields, creating an active input field, creating a register state, including transparent background images and adding interaction for all).