I think no one knows the calculation behind it from us devs. From what i understood there are a few factors that impact the review score.

This is [what we disclose in the docs](https://docs.apify.com/actors/publishing/actor-rating): Your Actor's rating is a weighted average that includes the following factors: - More recent reviews have a higher weight than the older ones. - Reviews from trusted users have a higher weight. Trusted means paying and higher number of uses, just to be clear! If you have any more questions, let me know.