Augmented reality (AR) brings flexibility and openness to learning. It also strengthens connections between learners in multiple contexts by adding a new dimension to mobile learning. As well, AR facilitates the learning process of the learners by bringing different disciplines together with education. This chapter focuses on technologies, tools, programs, operating systems, a number of standards as well as some parts of web infrastructure standards for use in mobile AR applications and then discusses the current state, issues, and direction of the development and the use of these apps. The purpose of this chapter is to provide information on that can be used by developers of mobile AR applications for learning and to assist educators and instructional designers in developing mobile augmented reality apps for learning by using AR development tools that provide them to create custom mobile AR applications without programming skills.