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Three main classes of barriers in designing mobile health apps as categorized by Schreiweis et al [31]. For each larger class, subboxes including specific issues are depicted. Boxes with solid borders represent barriers mentioned by Schreiweis et al [31]. Additional or more detailed hurdles we collected from the literature are highlighted by dashed lines [11-20]. The size of the boxes does not represent their relevance or severity. AI: artificial intelligence.
