Originally Lyft was introduced as a single app where users could switch to between driver and passenger modes in order to give and recieve rides. There were advantages at the beginning to having only one app with multiple modes, but after time this bloated the app size and decreased the rate that we could create and release new features. Splitting these two modes (one into a Passenger app and one into a Driver app) could be done in a few ways, but we settled upon using the modularization of various apsects of the code for the task. This talk will discuss the architecture and execution of this modularization used in order to release the Lyft Driver app.