This paper discusses working with single clinical experts to apply a set of recommendations to adapt and verify clinical information, specifically, clinical guidelines for mobile (smartphone) applications. The paper discusses user-centred design methods to understand and evaluate the impact of guideline changes based on recommendations. It also discusses the impact of working with a clinical expert, and the validation/verification of information. Finally, it compares the outputs of these processes using a set of app recommendations from the Royal College of Physicians. The paper highlights the impact of applying app recommendations and evidences the importance and impact of working with single experts.