This app is a tool aimed at elementary school PTAs, aiming to simplify the management of flag-waving rostering. Duty rosters, which were previously managed on paper or verbally, can now be viewed on a smartphone, making it easier to keep track of and change schedules. Since you can see not only your own roster but also the overall schedule at a glance, it reduces the workload and allows for efficient operation. Furthermore, the app makes it easier to plan and coordinate flag-waving rostering, reducing the burden on the PTA while supporting the safe commute to and from school for children.