That makes sense. I just use swiping instead of using the back button. I don't know if I am overly-worried about it, but I am concerned about wearing out buttons, and like using software, instead.
I have a couple of devices where the power button got crud or something down in there, and made the contact almost impossible to make.
I literally had to blow warm breath into the buttons (volume and power) to make them work easily.
That is how I found Wave Up, and I used an at the time ad-free volume booster (Speakerboost) app to control the volume.
So both of those apps have been included on all of my devices since, as I am now addicted to Wave Up and because well, just in case, lol.
I even keep the old ad-free versoon of Speakerboost around even though the boost part won't work on my new devices.
The volume does, and that is well enough- considering how small the app is.
I even have an outdated but still working Brightness Control app.
I was just curious, because I never have known anyone else that was using Wave Up just out of the blue before.