i-USEr is the biennial conference for the Human Computer Interaction and Malaysia's leading conference for the latest in HCI research and practice. This conference provides a platform for researchers, practitioners and industries to explore and discuss innovative studies of technology and its application in interfaces and welcomes completed research, work in progress and case studies. i-USEr attracts a broad community of researchers, industry practitioners, academics and students.

In line with these global directions, i-USEr 2021 chose "Sustainable UX" as the theme for this conference. It looks at user experience practices through the lens of sustainability via various mediums such as smartphones, mobile apps, websites, or simply everyday technology. It was held on 13-15 September 2021.