  Smartphone overuse has many negative effects on human beings. The function
App Limits in our phones, which belongs to behavior reinforcement strategies
for overcoming problematic smartphone overuse, constrains users by shutting
them completely out of an app after a certain period of time. While it has the
effectiveness to some extent, lacking procedural detection of problematic
behavior always brings about anxiety and depression for users. We proposed App
Limits Bar (ALB) to progress the traditional App Limits, aiming to mitigate the
negative feelings about using App Limits and enhance users' abilities to manage
their time on addictive apps. Meanwhile, we took a three-phase user study to
answer whether ALB helps users be more content with using the app limits
function and whether ALB performs better than traditional App Limits in terms
of reducing usage time and open times on addictive apps. Future work will study
the best shape of the edge screen for visualization when the front screen faces
us.
