iPad facebook group invite app

I'm a partner at a student night club events company. Every night we send out staff with a laptop, asking customers to login to their facebook and invite all their friends to our group. This takes a lot of time! We want to simplify the process with an iPad application that works like this: open app > login to facebook > click invite all > logout It needs to be very easy to operate! also it needs a settings tab (ideally in the ios settings section so customers dont see it) so that we can set the group that the application invites to. It also needs all of our branding and to have a very high quality feel to the app. Please send me examples of previous work (screenshots)