TimerTiTi is a free iPhone app designed by Minsang Kang to enhance study productivity. With TimerTiTi, users can utilize features like Record Measurement in both Timer and Stopwatch modes, customizable Target Time and Timer Settings, and detailed History Settings to track study progress effectively. The app offers comprehensive log views, including daily and weekly graphs, as well as notifications for impending timer completion and stopwatch milestones. Users can personalize their experience with color customization options and manage their tasks efficiently with the integrated Todolist feature. TimerTiTi is a valuable tool for students and professionals seeking to optimize their study routines.