Table 1.

Extended foot measurement app rating domains and criteria.

Domain	Criteria
App metadata	App platform App store rating App store description App store URL Number of downloads Origin Developer
App classification	App subcategory Applicable age groups App price
Aesthetics	Layout consistency and readability Content resolution Visual appeal Group targeting according to app content
General app features	Social sharing feature Authentication feature User onboarding interfaces Content customization Visual information Data export options Subscription options
Performance and efficiency	Bootup efficiency Accuracy of features and components Responsiveness of app Frequency of app crash Overheating device issues Battery life impact
Usability	Ease of use Navigational accuracy Gestural design Interactivity and user feedback
Measurement-specific functionality	Measurement of foot length and width Measurement of foot medial arch height Measurement of foot instep or joint girth Measurement of short or long heel girth Measurement of heel width Measurement of shoe size Measurement of forefoot tilt/rotation Additional setup Reconstruction of 3D foot model Additional out of scope features
Transparency	User consent Accuracy of store description Credibility/legitimacy of source Feasibility of achieving goals
Subjective quality	Overall star rating Overall app purchase preference Overall app recommendation Frequency of use based on relevance
Perceived impact of app on users	Awareness induction behavior Knowledge enhancing behavior Scope to improve attitude toward foot health Scope to reduce negligence toward foot Scope to induce foot-related help-seeking behavior