The RankDime crawler

This is the crawler behind the free check. It fetches a site only when someone asks for a check, and only public pages: the homepage, robots.txt, a public product list or sitemap when the site has one, and up to 48 pages so it can sample up to 24 product pages. A site with no product list stops at homepage findings.

It identifies itself. The User-Agent is:
Mozilla/5.0 (compatible; SEOCheck/1.0; free product-page SEO check; +https://seocheck.co.il/checker)

It respects robots.txt, including Crawl-delay. Without a delay it sends at most two requests at a time, with at least 0.6 seconds between the start of one request and the next. The same site is usually not checked again for 6 hours, and not more than 4 times a day.

The crawler token is SEOCheck, including on this site, so an existing robots.txt rule keeps working. To block it:

User-agent: SEOCheck
Disallow: /

Operator: Privacy.