This is still pinned on r/SimpleMobileTools:

11 Reasons why our apps rock

Since 2015 it was possible with Mobile Visions API.

Now it’s included in ML Kit

I think you can use some of microG’s APIs without connecting it to google.

It’s just not implemented yet: https://github.com/microg/GmsCore/issues/2018

Best practices would not require camera permissions to scan qr codes.

Scan barcodes

Android includes support for the Google Code Scanner API, powered by Google Play services, which allows you to decode barcodes without declaring any camera permissions. This API helps preserve user privacy and makes it less likely that you need to create a custom UI for your barcode-scanning use case.

The API scans the barcode and only returns the scan results to your app. Images are processed on-device, and Google doesn’t store any data or scan results.

https://developer.android.com/privacy-and-security/minimize-permission-requests

The far right complains after the search engine DuckDuckGo vows to limit Russian propaganda.

Misconceptions About DuckDuckGo: Did DuckDuckGo censor search results about the Russia-Ukraine war?

With osm I take the shortcuts that are not on google.

OSM is just map data. No navigation. You can add any routing engine, the problem is, google does not share that data.