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The development of a mental health app, one with significant potential for impacting on and transforming peoples' lives, requires a diligent approach for integrating and delivering clinical expertise which is to be used by a vulnerable user group. The challenges include ensuring adequate involvement of a user group that is not only hard to recruit, but equally complex to engage with in order to ensure ecological validity of the different elements of the user-centred design process. Discussing the design and deployment of an anxiety management app, SAM - Selfhelp for Anxiety Management, we present approaches adopted to address the challenges involved and the impact these had on the final design. The paper concludes with a set of pragmatic recommendations, based on our experience of the process.
Topham et al. (Mon,) studied this question.