Abstract: To improve user experience (UX) level for the elder, this paper proposes an evaluation
model of UX of APP for the elder based on grey analytic hierarchy process (AHP). Firstly, an
evaluation system is built. Second, the elderly preference weights for evaluation indexes are
investigated by AHP. Finally, the criteria of UX are integrated into grey relational grade by using grey
relational analysis (GRA) to obtain optimal design. A mobile health application was chosen as a case
study. The result indicates that the grey AHP-based evaluation model can be used to evaluate the UX
level of APP for the elder effectively, and designers can achieve insights for decision making of design.

Key words: user experience, analytic hierarchy process, grey relational analysis, the elder, APP