The good news is that, by default, modern iPhones have a "Lens Correction" feature turned on, found under Settings>Camera.
The best zoom lenses help you to get closer to your target whatever kind of photography you specialize in, and they're particularly beneficial for landscape, wildlife, sport and astrophotography.
Lens protectors are supposed to protect your lenses, so it's not ideal if they get scratched during the tricky removal ...
Buying a camera in a two-lens bundle is the best value – and means you won't need to buy more lenses any time soon ...