Apple’s latest flagship iPhones, the iPhone 13 Pro and the iPhone 13 Pro Max, have a 120Hz high refresh rate display. While it’s great to experience buttery-smooth animations and motion clarity in videos, games, etc., it’s not for everyone. Some people may not notice the difference since the iPhone dynamically adjusts the refresh rate to match the speed of your finger. But beyond that, the higher refresh rate uses more battery, thus you can potentially extend battery life by disabling ProMotion.