Score your tweet drafts against 36 rules from X's open-sourced recommendation algorithm before you post. Paste a draft, get an instant score with fixes. What-If Scenarios show impact of each change: - Remove external link: +52% reach - Add an image: +38% - Post at peak time: +25% - Optimize all rules: +77% Runs entirely in the browser. No account needed. AI features (slop detection, auto-optimize) are optional and use your own API key. Free and open source (MIT).