ryokurosu

This is keyword rank checker in Classic Editor.You could view top rank contents rapidly.
This tool displays the title, the number of characters, and the headline of the content above the search order of the specified keyword, and helps you create the content.
Understanding what kind of headline articles appear at the top helps you with ideas for similar content and original content.
It is hard to open various tools while opening WordPress, but if this plug-in is inserted, everything will be completed in the editor.
Add-ons allow you to see in more detail the features and top-view content you can add headings with a single click.
This plugin:
<ul>
<li>You can search top rank contents in each keyword.</li>
<li>Get information from Google “Custom Search JSON API” and display it.</li>
<li>If you want to know more about “Custom Search JSON API”, look at <a href="https://developers.google.com/custom-search/v1/overview" rel="nofollow ugc">this site</a>.</li>
<li>You have to comply with <a href="https://developers.google.com/custom-search/terms" rel="nofollow ugc">“Custom Search JSON API” terms of use</a>.</li>
</ul>

tobyhage

Are you also tired to pay expensive monthly subscriptions to keep track of your keywords. With this plugin you don’t need this services anymore. 
Keep track of your keywords on your own WordPress site for free.
The Seo Monitor was built to offer a simple ranking measurement tool for WordPress websites. You can now view how your website (or other websites) ranks for a number of different keywords right within the WordPress admin panel.
<h4>Features</h4>
<ul>
<li>Track your rankings on Google</li>
<li>Search using other Google Country URLs (e.g. google.co.uk)</li>
<li>Add as many websites and keywords you want</li>
<li>View historical ranking graph for each keyword</li>
<li>Keywords can be filtered on website, group, search engine or by search term. All data is sortable.</li>
<li>Action Log, all actions are logged in the action log. This log will automatically clean items older than two weeks. You can also delete log actions manually.</li>
<li>Delete single rankings per keyword, so that you can delete for example sample data.</li>
</ul>

Seo Monitor

Seo Monitor is a free WordPress plugin to monitor your SEO performance for your website(s).

Top Rank Content Checker vs Seo Monitor