I came across this free tool that checks your rank for the domain, pages and posts among other things.
All you do is enter your URL for any of these individually for results.
It's also great for checking the 'validity' of a 'used' website you may be interested in buying, or to buy advertising. You save yourself from getting scammed and includes a color scheme. This identifies a Fake or True page rank.
Below the box where you enter your URL, is the information on how it works.
You can add the Page Rank Checker icon on your website to keep track of your stats.
For newbies as myself, or more established we can monitor how we rank in search engine results. To see where our pages/posts stand.
This is the link:
When you scroll down you can see a list of what you can check. PR is the one for checking your pages/posts.