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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).
ReachOSGrammarly for tweet reach — scores drafts against X's algo
Aytunc YILDIZLIleft a comment
Hey everyone 👋 I built ReachOS because I kept wondering why some tweets reached thousands and others died silently. I wanted to see the score before hitting post. So I read through X's open-sourced algorithm (twitter/the-algorithm on GitHub). Nobody really dug into the scoring logic — most coverage was surface-level. I found 36 concrete rules: link penalties, media boosts, engagement...
ReachOSGrammarly for tweet reach — scores drafts against X's algo