The iPhone is the only product in Apple's lineup where Apple goes out of its way to avoid mentioning the amount of RAM. Apple has continued to upgrade the capacity and speed of its iPhone RAM over the years. Also, iOS is optimized to work with more limited memory availability. Often, the iPhone beats rivals with much more RAM in speed tests thanks to Apple's ability to control the hardware and software experience like that.
Still, if you're familiar with iPhone hardware, you probably know the iPhone 15 Pro and 15 Pro Max are the only iPhones in history featuring 8GB of RAM. The iPhone 16 models will all pack 8GB of RAM. Memory seems to be the bottleneck for on-device processing, a detail Apple insider Ming-Chi Kuo noted in his predictions for Apple's WWDC 2024 event on Monday. Specifically, Kuo said that Apple's development issues with its large language models for the iPhone.