What iPhone is best for aurora?

Excuse me, could you please clarify the context of your question? Are you asking about which iPhone model is best suited for some specific app or feature related to aurora, the natural phenomenon of colored lights in the sky? Or is there some other meaning to "aurora" in this context that I'm not aware of? In general, when it comes to iPhones, the latest models tend to offer the best performance, camera quality, and software support. However, if you're looking for a specific feature related to aurora, such as a particular camera mode or app, you may want to research which models offer that feature. Additionally, keep in mind that the cost of the latest models can be quite high, so you'll want to consider your budget as well.