At the moment I'm stuck with an old Android phone. Thus, no Whatsapp, no Facebook, no $LATEST_FAD_APP, no Uber app. (I am however able to get some apps from alternative app stores like F.droid.) I can obviously use web apps no problem. Google told me that the mobile site of Uber could be used if no app available, but they need to activate your account for it, which didn't happen: Uber support basically told me: upgrade your phone. Not happening.
In the mean time, the time for my hospital procedure which involved anesthetics (so no driving myself to and from the hospital) came and went, and that's one of the benefits of having a real life circle of friends: some can chip in and help you with a ride for not much more than a "thank you".
I guess I'll continue to drive myself, ride bicycle, bum rides, get courtesy lifts or loan vehicles from the workshop, rent a car, etc. as in the previous decades of my life.