A Cline Skill to Generate App Store Screenshots

Cline is happy to take on a whole task and run it to the end. Building store screenshots is a good candidate: it is well defined, repetitive, and dull to do by hand. You need a set for every device size, each with a caption and a device frame, sized exactly to Apple and Google specs.

Cline reads project rules on every session, so we wrote one that teaches it to generate the whole set.

What Cline does with it

With the rule installed, ask Cline for screenshots and it will:

1. Read your theme and config files for your app name and colors.
2. Ask which screens to showcase and take your raw captures.
3. Write a short, selling caption for each screen rather than a flat label.
4. Place each one on a device mockup at the right App Store and Play Store dimensions.
5. Upload the set and give you a link that opens it in an editor.

One run produces the complete lineup across iPhone, iPad, and Android sizes, with consistent design throughout.

Install it as a Cline rule

Cline loads every markdown file in the .clinerules folder and merges them into its instructions. From your project root, run:

mkdir -p .clinerules && curl -o .clinerules/generate-screenshots.md https://screenshotwhale.com/skills/generate-screenshots.md

Then tell Cline:

"Generate app store screenshots for my app"

Because the file lives in .clinerules, Cline includes it in every session automatically. Nothing else to wire up.

A starting point, not a black box

The link Cline returns opens the project in the ScreenshotWhale editor. Rewrite any caption, adjust colors, move the mockup, or replace an image. Cline does the heavy first pass, and the editor keeps every decision in your hands.

Add localization into 10 languages for a global launch, then export each device size as a store-ready PNG for App Store Connect and Google Play Console.

Preview before you sign up

Every project the skill creates comes with a public preview link, so you can see your screenshots without an account. A free account saves the project and lets you keep editing. Free exports include a small watermark and one feature graphic per day, enough to run the whole flow.

The same file works everywhere

The rule is plain markdown, so it also works in Claude Code, Codex, Cursor, and Windsurf. Set it up in Cline once and carry it to any agent that reads project instructions.

Hand the launch chore to the agent. Install the rule, ask Cline, and open your first screenshot set in minutes. screenshotwhale.com