Smart phone App to set-up and for end user.

Hi I'm new to this and need some direction. What I would like to do is build a system where i control two servos. The positioning will be controlled with Bluetooth buttons but the set-up with a smart phone/app.
It looks like I can do the set-up with Touch OSC, what I'm not sure about is, once the hardware is sorted and I've done the code how can I link the App to setup and then save the new settings? Think about me building the device and the end user using the App.

Go to the GooglePlay store and search for Remote xy. The app lets you configure the GUI for any kind of button,slider and others. It will also write the sketch for you. There are two versions. One is free and the Pro version is pay.