Outclass vs Sleek: AI mobile app designers compared
Sleek and Outclass both design every screen of a mobile app from a prompt. Here's how they differ on screen sizes, editing, Figma and code export.
Sleek and Outclass are the closest tools in this space: both are AI mobile app designers that turn a prompt into a full set of matching screens. The differences are in what you can start from, which devices you can design for and where the design goes next.
At a glance
| Outclass | Sleek | |
|---|---|---|
| Built for | Designing app screens for mobile, tablet and web | Designing mobile app screens |
| Start from | A text prompt, a screenshot or a screen recording | A prompt, a spec or a screenshot |
| Screen sizes | Mobile, tablet and desktop web pages | Mobile app screens |
| Editing | Chat, a click-to-edit visual editor, and a theme panel | Edit by hand or ask in chat |
| Figma | One-click copy to Figma as editable layers with auto layout | Paste into Figma as native layers |
| Code | HTML of each screen, PNG export, shareable HTML | React with Tailwind or plain HTML |
| Coding agents | MCP server for Claude Code, Cursor, VS Code and ChatGPT | Prompts and agent skills for coding agents |
What Sleek does well
Sleek is focused: it designs mobile apps and does it with care. It plans a visual identity and the list of screens before drawing, so every screen matches. Its React and Tailwind export and the prompts it writes for coding agents make it a good fit if you plan to build the app with Claude Code, Cursor or Codex straight away.
What Outclass does differently
- More than phones. Outclass designs tablet screens and desktop web pages as well as mobile screens, and adapts a screen to another size locally, so one project can cover the app and its website.
- Recreate what you've seen. Upload a screenshot (or a board of several phone screens) or a screen recording, and Outclass rebuilds it as editable screens, keeping real photos as crops.
- A real visual editor. Click any element to change its text, size, spacing, colors, radius or shadow; drag and resize with snapping; reorder layers; undo every step. Small changes cost no AI credits.
- Your brand in one step. Import colors and fonts from your website or a DESIGN.md file, or tune them in the theme panel, and every screen follows.
- Free exports. Copy to Figma, PNG and HTML export never use credits.
Which should you choose?
Choose Sleek if you only design phone apps and want React code and coding-agent prompts as the main output.
Choose Outclass if you want mobile, tablet and web screens in one place, need to recreate designs from screenshots or recordings, or prefer to polish details yourself in a visual editor before taking the screens to Figma.
The quickest way to decide is to give each the same prompt and compare the results.
Sources: Sleek's homepage.
Details about other tools were checked on 30 October 2026. Products change quickly, so check each tool's own site for current features and prices.