We designed the questionnaire from our own experience as the 3rd year SIT B.Sc. IT students when using smartphone applications. The questionnaire included nine questions. When we finished the design, we found out the comment of questionnaire design from a small group of 3rd year SIT students. This practice is known as a “Pilot Study”. Then, we distributed the questionnaire to the 3rd year SIT B.Sc. IT students by using a google online form known as “Google Form”.