As long as you don't need the absolute maximum in battery life and camera zoom, Apple's iPhone 15 Pro does nearly everything the Pro Max does in a smaller size that's easier to hold and use.
So, you have an iPhone 13 Pro and are considering upgrade to an iPhone 15 Pro. There are a few reasons to do so and still others that might hold you back.
Apple's iPhone 15 Pro Max features new materials, upgraded components, terrific cameras, and top-of-the-line performance, making it one of the best smartphones you can buy.