I downloaded it from uptodown a few weeks ago and can confirm that it runs fine without google play services. It only gives you an error message on some occasio

I downloaded it from uptodown a few weeks ago and can confirm that it runs fine without google play services. It only gives you an error message on some occasions which you can ignore. However, I don't really trust uptodown. When I asked them where they sourced their apps from I didn't get a reply. I also mailed DB and they said they publish to Google Play only. Now I've checked the apk file with various online tools but I still feel slightly uneasy about it. I really hope that one day institutions like public transport operators and public service broadcasters publish they apps in google-free stores. I don't want to depend on the Google Playstore one day because there's no other way to purchase an electronic ticket or to use tv on demand services.