Agreed. I categorically refuse to install non-FOSS apps on my phone. I don't use social media, and refuse to use Uber for various reasons (including those explained in this article). I do buy things on Amazon, but only those that are physically delivered to my door (rather than "subscriptions" aka buying things that you won't own).
How about banking apps? In my part of Europe a growing number of banks require installing an app via Google or Apple story. The Android ones are known to use sdks that at full of "telemetry". Cash is no longer an alternative.
Can you not use a browser to access banking services? If not, you should vehemently complain and/or move to another bank. And while cash is better for privacy, you can always use a credit card instead of your phone.
