Usability Evaluation of COVID-19 Mobile Apps Using SUS

The whole world is going through an unprecedented crisis in the wake of the

Coronavirus disease (COVID-19) outbreak resulting in lockdowns and imposing

restrictions on economic activities. Governments are leveraging technology for

identifying, monitoring, tracking, and containing active cases using mobile apps. Many

countries have developed and deployed COVID-19 mobile apps to track patients, trace

contacts of infected people, and provide services and facilities medicines to needy

people. Indian government developed the “AarogyaSetu” app to track infected patients.

However, the utility of these apps, their effectiveness, their usability score raises many

open questions. A description of usability, usability attributes, and usability evaluation

methods for such apps are presented in this chapter. The chapter also covers the results

of practical experiments due to COVID-19 mobile apps from different countries and

different apps developed by various states in India and shows the calculated usability

score. This chapter will help the reader to understand the usability of COVID-19

mobile apps. A questionnaire collects usability attributes like efficiency, effectiveness,

user satisfaction, user feedback, etc. In the questionnaire, usability evaluators prepared

ten questions about each attribute, each question having five responses from strongly

agree to strongly disagree. These responses are evaluated and used to calculate the

app's usability score using the System Usability Scale (SUS) tool. Using this score will

help governments and organizations identify problem areas and improve the usability

score.

Keywords: Centralized apps, Contact tracing, Coronavirus, COVID-19, Decentralized apps, Empirical study, India's Aarogyasetu, Mobile applications, Questionnaire, QUIS, SUS, Track patients, Usability, Usability attributes, Usability evaluation, Usability evaluators, Usability models, Usability score, Usability scorecard, Usability standards.

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