Nowadays, online education represents a tremendous opportunity for global education systems to guarantee the continuity of student learning, and Information and Communication Technologies (ICTs) must play a key role in addressing the challenges of contemporary education. From this perspective, mobile learning and educational apps have facilitated the tasks of many teachers that need to prepare virtual lessons. The challenge lies in the selection of resources that have pedagogical value and can help meet learning goals. The objective of this article is 1) to describe the adaptation and validation processes of a rubric designed to assess the educational value of mobile applications, and 2) to report the initial results of the application of this instrument. The resulting instrument is called RubricApp. It has a reliability coefficient of alpha =.783 and is structured in 10 indicators and 3 dimensions: educational value, design, and participation and motivation.