The best motion designers I know aren’t trying to impress you. They’re trying to make you feel that the screen is real. Emil Kowalski talks about materiality — the sense that UI has weight, that it’s obeying some physical law you can’t quite name. Jakub Krehel pushes on personality — animations that say something specific about the product’s point of view. Jhey Tompkins makes the impossible look cheap.

I wanted feedback from all three. Not generic “make it smoother” feedback. Specific, opinionated, per-designer feedback on the same animation. So I built it.

Design Motion Principles reads your UI animation — CSS, Framer Motion, GSAP, whatever — and audits it through three lenses in parallel. Emil on materiality. Jakub on personality. Jhey on the technical move. Then it weights the feedback based on what you’re actually building. An onboarding delight animation gets different advice than a page-transition between dashboard views.

I use it on everything now. Every skill I ship, every portfolio update, every client deliverable runs through this first. It’s not a replacement for actually watching the designers’ talks. It’s what helps me keep their voices in my head when I’m writing code at 11pm.