vøiddo

rankd scores the post you are writing on a 0-100 quality scale, in the editor sidebar. Six axes — readability, structure, length, links, images, title — plus actionable suggestions on what to fix before you hit publish.
The plugin connects to your rankd account. Each WordPress verdict uses the same rankd quota as the web product: free accounts get 2 verdicts per day; Pro gets 500 verdicts per month.
<h4>What it does</h4>
<ul>
<li>Editor sidebar verdict — opens as a meta box on every post and page edit screen</li>
<li>Six axes scored 0-100 — readability, structure, length, links, images, title</li>
<li>Actionable suggestions — short, specific, ranked by impact</li>
<li>Quota-aware — runs only when you click, so typing does not burn verdicts</li>
<li>Works in Gutenberg and Classic Editor — auto-detects which one you are using</li>
</ul>
<h3>External Services</h3>
This plugin connects to <code>https://rankd.voiddo.com/api/wp/content-score</code> when you click run rankd verdict.
What data is sent and when:
<ul>
<li>post title</li>
<li>post content</li>
<li>site URL</li>
</ul>
The plugin sends that data only when you click run rankd verdict. It does not send content while you type. It does not write post meta, publish content, or alter your post.
Why the service exists:
<ul>
<li>generate a 0-100 content quality verdict</li>
<li>return ranked suggestions before publish</li>
<li>apply the same quota logic as the rankd web app</li>
</ul>
A rankd account and WordPress API token are required. Free rankd accounts include 2 verdicts per day. rankd Pro includes 500 verdicts per month and is available at $4.99/month or $49.99/year. Pricing and quota may be changed on the rankd pricing page, and the active quota returned by rankd is shown after each verdict.
Service pages:
<ul>
<li>Pricing: https://rankd.voiddo.com/pricing</li>
<li>Privacy: https://rankd.voiddo.com/privacy</li>
<li>Terms: https://rankd.voiddo.com/terms</li>
<li>Support: support@voiddo.com</li>
</ul>
<h4>Why a sidebar scorer</h4>
Existing SEO plugins focus on keyword targeting and serialize their advice across multiple panels. rankd answers a different question: “is this post structurally good before I worry about keywords?” — readability, sectioning, link density, image alt text, title length. The basics that lift any post regardless of niche.
<h4>Six axes scored</h4>
<ul>
<li>Readability — sentence length and word complexity (lower is easier)</li>
<li>Structure — H2/H3 distribution and section count</li>
<li>Length — sweet-spot around 800-2000 words; penalty at the extremes</li>
<li>Links — outbound + internal density (1 per ~250 words is healthy)</li>
<li>Images — at least one image with alt text on posts over ~200 words</li>
<li>Title — 30-65 characters is the SEO sweet spot</li>
</ul>
The composite is a weighted average; each axis is exposed individually so you can see what is dragging.
<h4>How it differs from generic readability tools</h4>
<ul>
<li>Lives where you write — the WordPress editor sidebar — not a separate site</li>
<li>Uses the same rankd quota and upgrade path as the main product</li>
<li>Runs on explicit click only — no quota burn while typing</li>
<li>Keeps the verdict separate from publishing — you decide what to change</li>
</ul>
<h3>About</h3>
Built by vøiddo — a small studio shipping AI-flavoured products, free dev tools, Chrome extensions and weird browser games.

rankd — Content Quality Scorer

Score any post's quality 0-100 before you publish. Connects to your rankd account and uses your rankd verdict quota.

Mike Riethmuller

Better Writing is a WordPress plugin that helps you write better content.
Readability
One way it achieves this is by providing readability information as you type. You can select from one of 5 different readability scoring methods including:
<ul>
<li>Flesch reading ease formula</li>
<li>Coleman Liau index</li>
<li>Gunning fog index</li>
<li>SMOG Index</li>
<li>Automated readability index</li>
</ul>
You are able to see at a glance if your content is on target with the readability meta box on the WordPress edit screen. You can also set a custom target score and sort posts and pages by readability.
All features can be turned on or off for posts, pages or even custom post types.
Use details of your readability score elsewhere within WordPress by using shortcodes. 
* [readability-score] 
* [readability-method] 
* [readability-flesch] 
* [readability-coleman] 
* [readability-gunning] 
* [readability-smog] 
* [readability-ari]
Preferred terms
Consistent use of language is important and is something that can easily suffer, especially where multiple writers are involved. Better Writing allows you to maintain a list of your preferred terms and non preferred terms. It will prompt writers and editors with spell-check style suggestions in the content editor. It will check as you type and allows for multiple terms and multiple suggestions.
All features are designed to be non-intrusive and let you get on with your work, whilst giving you the tools you need to help you write better without distraction.
<h3>Credits</h3>
Credit to Dave Child for use of https://github.com/DaveChild/Text-Statistics.

Better Writing

Helps you write better content with readability scores and preferred terms as you type. Highly configurable.

rankd — Content Quality Scorer vs Better Writing