iOS App Store pages

In-app UI is the other skills. This skill is store listing and marketing: screenshots, preview video frames, and the website that sells the app.

App Store screenshots

Each frame has one job. Caption is a benefit, not a feature name.

Crop big. Do not shrink the entire UI to fit. Show the hero of the screen (the metric, the photo, the result)
Device frames optional; if used, keep them consistent
First two slots do the most work (list + today tab). Put the aha there
Dark/light: match the product’s best contrast, not both in one set unless localized sets exist
No tiny body text that dies at thumbnail size. Huge number, huge object, few words
Localization: text in the caption and in the UI must match the store locale

Sequence like a story: problem or identity → the core mechanic → proof → social or result → a reason to download.