勉強時間管理 is an educational app that allows users to plan and record their study time, as well as visualize their progress through graphs. The app offers various features such as a convenient timer and stopwatch for recording study time, as well as graphs and aggregate tables to track study achievements from different perspectives. Users can also share their progress on Twitter to stay motivated. The app allows users to set study goals and provides notifications to remind them of their study schedule. It also offers a widget that displays daily study plans and allows for easy access to the study time recording screen. With the ability to set study periods ranging from daily to custom durations, this app is not only suitable for exam preparation but also for managing study time during regular tests and long vacations. One of the notable aspects of this app is that it does not require any login or internet connection, making it easy to use from the start.