H7 was supported. If travellers who use mobile app guide services and gain perceived usefulness,it means that travellers are more satisfied with the guide services provided in the system and can bemore experiencing the combined use context during travel; this is beneficial for increasing their travelintentions (Wu et al., 2018). Based on this result, it is found that perceived usefulness is a mediator tolink for the relationship of experiential marketing (t = 3.565) and mobility (t = 2.627) with use context.The result of H7 is consistent with Mallat et al. (2009), however, it is contrary to Chen et al.’s (2015)finding of mobile application for high speed rail. This study believes that it can highlight the role ofuse context only when the traveller is under the time urgency and has no other options to purchaseimmediately. Public transportation (e.g. high speed rail) has the characteristic of multiple ticket purchase channels, such as ticket vending machine or personnel service, and the ticket can be sold bycash or credit card. Those not only reduce travellers’ pressure and perception of time constraints butalso hide the effect of use context, even though travellers perceive the ticket app as useful.