The actual aspect ratios per modern iPhone class:
1320 × 2868 = 2.173 (≈ 19.5:9)1290 × 2796 = 2.1671170 × 2532 = 2.1641242 × 2208 = 1.778 (16:9)The 5.5" class is the outlier — older devices used 16:9. If you're designing for both, anchor critical content to the center vertical strip so it stays visible in both ratios.
The App Store renders screenshots with rounded corners (matching the device frame) and may overlay app metadata in some carousel positions. Empirically:
Captions and CTAs should sit between 80 and 600 px from the top of the design — visible at thumbnail size, not clipped at full size.
Eye-tracking studies of App Store carousels (consistent across multiple ASO firms' analyses, 2024-2026) put the strongest attention in the upper-left quadrant of each panel. Critical caption text reads best when it spans the top quarter of the panel and uses high-contrast color against the background. Device renderings work better when they're slightly tilted (8-15° around Y axis) rather than dead-on.
If you're designing in Figma or Photoshop, drop these guides onto your canvas (using 6.9" as base, scale proportionally for other classes):