I mean, I know its not practical for everyone or every application - that being said I have made it my highest priority to go out of my way to not use services or products that require apps to be installed. Obviously I make exceptions for stuff I deem "required" but for coffee chains, fast food restaurants, grocery stores and other services if they need an "app" for me to use it. I just won't use it. Or I will go out…
Put together an oral argument and rehearse it to fit whatever is the time limit for speakers from the public, and sign up to speak at the next meeting. Angles to consider: ageism, economic justice, equal protection under the law, identity theft, vetting of software vendors.
For added force, get in touch with neighbors, try to stir up a bit of indignation from them as well, and channel it into showing up at the meeting with you for visible support. Better yet, urge them to take a speaking slot themselves. Coordinate content of your respective presentations, and help tune each others, at least at the level of reviewing speaking notes, ideally with a standup practice run-through.
If there's a local paper that covers council meetings, write a "letter to the editor". And try to get their attention onto your talk with a heads-up to them just before the meeting at which you will speak.