You can only use one app, I had to choose phone over my iPad as I use pay using QR code scan -l guess that when they upgrade their security they will allow multiple online access points.
Very difficult now with agents and lawyers throwing (your) money at the problem - technically only residents can open a Thai bank account, BKK bank used to bend the rules if you spend 5k on an insurance policy.
Nope I have online banking I visit the branch once or twice a year , most important visit is to collect statement and letter for visa renewal which takes 10 mins and B100
SCB Easi Pass pays 2.5% before tax been using it for 3 years - also very user friendly when you need statement and letter for immig there is no passbook and it’s all on line very convenient