What's the most annoying part of making App Store screenshots or demo videos?

Hey! Launching Genvap on Product Hunt tomorrow - it turns screen recordings and screenshots of your app into cinematic 3D device showcases for App Store previews and promo videos.

How do other developers handle their app previews? Photoshop, Figma, one of the subscription mockup tools, or just skipping it because it's a hassle? My own pain point was paying $30/mo for a tool I used four times a year - that's why with Genvap there's no subscription. Let me know what you think of the idea and my execution of it!