iOS Developer for Camera App Customization

I am seeking an iOS developer based in India, with expertise and proficiency in functionality development. This specific project involves working on some customizations for the camera app. At the moment we have a camera app which opens with default 0.5x wide angle, and if a user would like to take pictures from horizontal axis then we are willing to rotate camera as soon as user rotates his device, now for that if you or your team would suggest us to switch on automatic rotation, then you can add a popup in the app to On Autorotation, and as soon as user clicks on that, autorotation should gets on and upon rotation of mobile the camera should automatically rotates, this is a first approach. Let us have a detailed discussion over it.