Abstract:
Smartphones take a very crucial part of users’ lifestyles nowadays. Many of the
most popular mobile operating systems today, offer a wide range of applications
with multiplefeatures. Usability is the evaluation of the quality and usefulness of
smartphone applications. Most of the researchers have focused on adaptability
with mobile applications and ignore the user context. Many researches have also
discussed improving the usability of mobile apps to help people motivate
themselves and achieve desired goals.This paper aims to evaluate the usability of
the eZ Cash mobile app with usability principles. The sample was selected by
using a convenient sampling method, a survey was conducted using 100 eZ Cash
mobile app users. Plantation workers in Nuwara EliyaDistrict, Sri Lanka are the
participants in this research. The research was conducted in three steps. At the
first step, the literature survey was conducted relevant to the study andidentified
the appropriate model and questionnaire for the study. In the second step, a pilot
survey was conducted using the questionnaire. Finally, a field survey was
conducted by using the refined questionnaire. The researcher uses Cronbach’s
alpha value to test the reliability of the questionnaire. Descriptive statistics,
Pearson’s coefficient of correlationand simple linear regressions were used to test
the hypotheses. The findings revealed that there are significant differences in
usability metrics and usability principles as independent variables. According to
regression analysis, predictability, synthesizability, familiarity, and consistency
positively affect usability metrics and generalizability impact negatively in
usability metrics.
