Samethru checks that what your app shows on screen matches your API and your database, and shows exactly where it goes wrong when it doesn't. It plugs into Claude Code, Cursor, Codex and Gemini CLI. Your assistant traces where each value comes from; Samethru compares it across all three and names the bug: wrong prices, dates shifted by timezones, lists cut off by pagination, stale caches and 8 more. Runs on your machine, read-only. Free.
