The number of custom mobile applications you can build with an app builder platform depends upon the platform’s features. Some platforms offer tools for creating a basic mobile application, while others provide advanced features. Generally speaking, mobile app developers can use an app builder platform to build up to five mobile applications. However, mobile developers can also purchase additional mobile app development software to increase the number of mobile apps they can create using the platform. Additionally, mobile developers can use their existing code on multiple mobile app development platforms for a more cost-effective solution. Software developers can use mobile app builders.