AppvaluatorBot

AppvaluatorBot fetches a single page only when a person asks Appvaluator to evaluate that URL. It reads robots.txt first and stops if the page is disallowed for AppvaluatorBot or for all user agents. It also reads the sitemap index, if one exists. It doesn't crawl links, run JavaScript, submit forms or access anything behind a login.

To opt out, add to your robots.txt:

User-agent: AppvaluatorBot
Disallow: /