Some examples of a system for providing a visual based programming interface for developing camera-based applications may include a code editor interface, a timeline interface, a canvas interface and/or a program session interface. For instance, the code editor interface may allow a programmer to view and edit source code, the timeline interface may present application data associated with a program session in a frame by frame manner, the canvas interface may allow the programmer to view, interact with, arrange and/or annotate the application data in a visual format, and the program session interface may allow the programmer to choose application data to display in the timeline interface and the canvas interface by selecting between historical program sessions and live program sessions.