I am Harsh and I doing my Masters from a university in US and need to develop an app for a project. My project idea is to a build an app that to provide instructions to a user on how to use an Android or Apple mobile device. The app needs to work on both Android and IOS platforms. First comes Main screen with all Brands, then comes 2nd screen with all phones from that brand, third and final screen once the user clicks on a particular phone. On this screen there will be links to articles on the left and the article/image would open on the right. I should have the ability to add/remove a brand and a phone with an editable template to change any instructions/images.