Update Android app Content Dynamically

Basically I’m making an android app and I would like to be able to add content dynamically without having to update the app. For example I would like to add a image to a server and then it be updated in my app.

Can anyone give me some guidance on where I can get started? Should I be using php, mySQL?, or something else? In addition, if there is something that I can get in the asset store for this then that would be even better. Haven’t been able to find anything so any advice would be great!

Thanks

Would putting an image on my site and then download it through the script below work?

var www : WWW = new WWW (url);

// Wait for download to complete
yield www;

// assign texture
renderer.material.mainTexture = www.texture;

I’m unsure of how I could find new images through. When the app starts if it could search to find new images somehow that could work.