Information and Communication Technology (ICT) is being increasingly explored and used in enhancing the reach to learners in ODL who are physically separated from teachers. ICT has helped in their inclusion into the education system. One of the most handy tools for communicating and interacting among the open and distance education learners and teachers is mobile. Though efficacy of ICT has been established without doubt in managing educational administration, it is being rigorously explored in teaching and learning especially in area of mobile learning. In fact, mobiles can play a big role in anywhere and everywhere teaching and learning of open and distance education. Mobile applications called apps are flooding the education sector like app tsunami. This paper explores the use of mobile app for orienting the ODL learners about the basic concepts of open and distance learning. The mobile app was designed and developed using MIT App inventor. The mobile called Open and Distance Education (ODE) was sent to ninety (90) learners of Master of Arts in Distance Education (MADE) programme of 2015 and 2016 batches. Their feedback was sought on the design and the usefulness and perception of learners on the mobile application-ODE in understanding the basic concept of open and distance education through a questionnaire developed using Google Forms. The results reflected the positive perception of learners towards on the usefulness of mobile application for teaching and learning in Open and Distance Education Institutions. Most of learners supported the use of mobile app in ODL.