Understanding Users Behavior of Unreachable Interface on Large Mobile Screens and Assisted Targeting by Customization

As large-screen smartphones are current trend, there are more interfaces elements on the screen are unreachable with single-handed usage. To under- stand users’ behaviors of targeting hard-to-access interfaces, we conducted the user study with 32 participants and found that most hard-to-access occurred on specific interface patterns, which were accessed frequently in daily usage. For example, 87.5% participants reported the navigation bar is hard- to-access and average occurring rate is over 3 times per day. Exploiting this habitual usage, we designed one-time UI customization to repositioned the heavy-usage interfaces to their comfortable region on large screen. Further, we implemented the UI customization on iOS navigation bar, Adaptable Navigation Bar , which decrease developer’s effort and ease-to-adapt to existing projects. From the feedback of 12 end-users, two designers and one developer, our UI customization is an well-potential solution to apply on current apps.