Viewpo
I kept watching the same thing happen. Someone would build a site with AI — Bolt, Lovable, Cursor, v0 — ship it, and then get a message: "it's broken on my phone."
The problem isn't the AI. The AI writes perfectly valid CSS. The problem is that nobody checks the result at real viewport sizes. Not the AI (it can't see what it builds), not the developer (they're on a laptop), and not the designer (they're resizing a browser window and hoping they catch everything).
Viewpo is the missing step. Paste a URL, get real browser screenshots at phone, tablet, and desktop sizes, and an A-F grade with specific issues to fix — in plain language, not CSS jargon. Share the report link instead of taking screenshots.
For AI coding agents, there's an HTTP API that returns structured JSON. The agent builds the site, audits it, sees a Grade D with 7 overflow issues, fixes the CSS, re-audits, gets a Grade A. No human ever resized a browser.
The mission
Make responsive design quality visible and measurable. Every site should know its grade.
Who's behind this
Viewpo is built by Little Bear Apps, an indie software studio in Australia. I build developer tools — small, focused utilities that solve real problems without the enterprise bloat.