The washing machines I use are controlled with an app, but that’s because they’re in the basement of my building and that’s how we all pay to use them. I have to say, it’s much better than scrounging for quarters, although those still work if the app is down. Our previous company’s app would tell how many washers were available, so you’d know if it was worth lugging your laundry downstairs. The one we have now doesn’t even have reliable “all finished” notifications. But it’s simple to set an ordinary timer on my phone.