Ask HN: What are some sources that show a given app's number of active users?

Currently in the process of finding competitor research tools and so far I've used Similar Web's tools through their trial version.

Are there any other services/sources like this that allow users to search for an app in the Play/iOS stores and show a selected app's daily/monthly active users? Preferably (if there are any), those that do not require payment or at least provide a trial version, and that do not require "booking a demo"?

Thank you in advance for your suggestions