Apple iPhone (2007)

The Apple iPhone (2007) single-handedly redefined the smartphone category. Its 3.5-inch capacitive multi-touch display eliminated physical keyboards—a move that outperforms #2's initial reliance on hardware keys for input. The iPhone sold 6.1 million units in its first year, a figure that was 30% higher than the average high-end phone of the era. It also introduced the App Store, an ecosystem now generating over $1 trillion in annual commerce, cementing its legacy as the blueprint for modern smartphones.