In today's rapidly advancing technology, smartphones, as an indispensable part of our daily lives, have always been the focus of competition among major manufacturers for improving their performance and optimizing user experience. Apple, as a leader in the smartphone industry, attracts widespread attention worldwide with every new product release. In 2021, with the launch of the iPhone 13 series, Apple once again took an important step in technological innovation, especially by introducing an adaptive refresh rate technology called ProMotion in the iPhone 13 Pro and 13 Pro Max models. This change not only improved the user experience, but also achieved new breakthroughs in energy management.