It is necessary to add the color indication of the overall PSI score, the same as in the official PSI.

At regular comparison, it would be convenient not to insert a link every time anew. It would be more suitable if the URL was saved in a cookie and restored in the field when updating the page.

It would be cool to insert several links at once and get comparisons for all.

Usually, people look at the results, improving them over and over again. Being able to see this change in progress would be cool.

To do this, needs

1. Save each new result to local storage, if it differs from the previous one.
2. Show an opportunity to see past results
3. In each result, highlight changes compared to the last result: improvements - in green, deterioration - in red.

It would be cool to export a comparison of results to table views, for example, in .csv.