Uber clone apps are popular because they provide a convenient and cost-effective way for businesses and individuals to start their own ride-hailing service. These apps are pre-built and can be customized to fit the specific needs of the user. They also come with features such as GPS tracking, in-app payments, and driver management, which make the process of hailing a ride easier and more efficient. Additionally, the rise of smartphones and mobile internet access has made it easier for people to use these apps, increasing their popularity. Furthermore, the increasing demand for on-demand services has also contributed to the popularity of Uber clone apps.