  While smart mobile health apps that adapt to users' progressive individual
needs are proliferating, many of them struggle to fulfill their promises due to
an inferior user experience. Understanding the concerns of real-world users
related to those apps, and their smart components in particular, could help
advance the app design to attract and retain users. In this paper, we target
this issue through a preliminary thematic analysis of 120 user reviews of six
smart health apps. We found that accuracy, customizability, and convenience of
data input are primary concerns raised in real-world user reviews. Many
concerns on the smart components are related to the trust issue of the users
towards the apps. However, several important aspects such as privacy and
fairness were rarely discussed in the reviews. Overall, our study provides
insights that can inspire further investigations to support the design of smart
mobile health apps.
