ScreenshotWhale makes the store assets you need to ship an app: App Store and Google Play screenshots, feature graphics, and icons.
The quickest way to see the point of it is to upload a few raw screenshots. It generates a full store set with actual marketing copy instead of "Settings screen", and can localize the text into 10 languages. If you would rather build by hand, there are templates and a full editor with 22 device presets, so one project exports every size Apple and Google ask for.
If you live in your IDE, there is a skill for Claude Code, Cursor and Codex. One command installs it, your agent reads your codebase for colors and context, and you get a link to the finished project in the editor. You don't need an account to try that.
There is also an ASO workspace. Paste your store URL and it pulls in your listing, keywords and up to 5 competitors, so you can fix your metadata in the same place you make your screenshots.
Free gets you the full editor and one AI feature graphic a day. Paid is $9.99 a month, or $9.90 once for 30 days of everything with no subscription.
I run this alone. 1,300+ app makers use it.
