I’ve read where the phone banking apps aren’t as secure as computer connections. My kids all use their phones. My wife uses the computer a lot. I still mainly use checks to pay bills.
I go through a set of checks in about 4 or 5 years.
I try to go cash, some debit or credit card when I have to.
One option you might consider is to simply use banking web sites on your phone, rather than the banking app. They all have a “mobile” version that works just fine. That’s what I do - as I suspect that phone apps - besides being less secure (in my opinion) like every other app you download harvests far more information than necessary for them to complete a transaction. I also use 2-factor authentication to log in (every time) on accounts that can be so configured.
I write maybe 5 checks a year.