maybe list the cards you have? I doubt you'll do a new app just for this
what kind of roadside assistance do you want? a lot of them are basic ones (AAA basic/credit cards), covers up to 5-10 miles towing and stuff like jumpstart/lockout/gas-delivery (or some max value amount like $100)
AAA premium covers up to 100/200 miles
what about the car insurance? some insurace covers/offers option to cover roadside assistance too