What relationship does the staff app have to MyChamberApp? The mobile staff app does not impact MyChamberApp. That is an entirely different service offered by a 3rd party and used by consumers to find your members products and services. Your database, if you have a relationship with MyChamberApp, integrates with MCA and can provide revenue generating opportunities with listing upgrades and advertising through their ad program. All active members have a basic listing that includes their member name, address, phone number and website link.