The most downloaded iPhone app of 2024 is Temu, a Chinese-owned e-commerce platform known for significant discounts. It surpassed popular apps like TikTok and ChatGPT, especially among Gen Z consumers, with 42 million downloads in ten months. Despite its success, Temu could face challenges from potential tariffs on Chinese goods. Other notable apps in the top 20 include Amazon, Shein, and McDonald's, reflecting a consumer trend focused on deals.