“…As mentioned before, the principles of this framework suit the development of persuasive system and as mentioned by Oinas-Kukkonen and Harjumaa [15] these principles should be transformed as software requirements and system features. On top of that, there are numbers of studies that have proven that PSD are able to increase users' adherence towards system, increase self-efficacy, create technology acceptance, allow user engagement with high activation and retention rate, create emotional and visual excitement and lead to user satisfaction with positive experience towards the incorporated software products as shown in Table 2 [26], [27], [28], [29], [30], [31] Technology acceptance [32], [33], [34], [35], [36], [37], [38], [39], [40] User engagement (high activation and retention rate) [32], [41], [42], [43], [44], [45], [46], [47], [48], [49], [50], [38] User emotional and visual excitement [51, [47], [52] User satisfaction (Positive experience) [46], [53], [52], [54], [55], [56], [44] Therefore, in this study, PSD is selected as the best guideline to identify the persuasive system design implemented in the mobile applications selected for this study as it provides more detailed and comprehensive set of system requirement that allows the systems developed to persuade the users and eventually will creating us...…”