Do we need the latest iPhone to develop apps
I am just asking this because if I am stuck on a 2 year contract, and I wanted an iPhone 7 when it was released, but I don't have enough money to pay the contract ditch, will I need the latest phone to develop an app? If I don't have a phone, or any iOS device, will my app fail? I am making apps like camera apps, even some social apps, and a lot of things, if I publish Hello World, will my app be rejected?
iPhone 6s Plus, iOS 9.2.1, White Gold