App promo videos are usually a slideshow of screenshots with a zoom. Hyzgen's Motion Studio drives a real engine: one shape morphs through interface components on a 120 BPM grid, a cursor taps, screens push in from the right, a stat counts up, a scan line sweeps your screenshot. The preview you scrub in the browser is the same engine the renderer samples, frame by frame.
Give it a link and it reads your app's name, pitch, colours, logo and screenshots from the page or the store listing itself, then writes a storyboard: a promo, a launch or an onboarding walk-through, in your accent colour, with your real screens. Upload three or more screenshots or a screen recording and it films your actual flow, screen to screen, tapping the element that leads to the next.