Free/cheap tool for DAU/MAU estimates by country?

Does anyone know a cheap/free tool for estimated DAU/MAU of mobile apps?

I'm looking for DAU and MAU only, ideally separately for Android (Google Play) and iOS (App Store) and by country.

I don't need downloads, revenue, ASO or rankings.

I'm just a hobbyist/independent researcher, so Sensor Tower/Similarweb are too expensive for me.

Any lesser-known tools or ways to get this data?