On-page SEO tools with no invented scores: a meta tag generator that emits the complete, correct head block, and a Google SERP preview that shows truncation before you publish instead of after.
They pair with the Website category's checkers: generate tags here, then verify what a live page actually ships with the Open Graph Checker.
What these tools do not do is rank you. They generate correct markup and verify what a live page actually ships, which is the half that is objectively checkable. The other half, whether the page deserves the position, is content and links. A sensible loop: generate the tags here, confirm what is live with the checkers in the Website category, then watch Search Console for the impressions and positions that tell you whether any of it landed.