TIIAN is a versatile health and fitness application designed for Android users, enabling comprehensive tracking of daily water intake, meal windows, weight, body measurements, menstrual cycles, and blood sugar levels. The app offers customizable fasting tracking and reminders for fluid intake and dietary supplements, ensuring users stay on top of their health goals. Additionally, it includes features for recording weight and measurements with graphical overviews and a personal photo library, enhancing the user experience.

Beyond the basic functionalities, TIIAN offers extra features for users who subscribe to their dietary programs. These include detailed diet descriptions, weekly shopping lists, schedules, and recipe instructions. The application is continuously updated and expanded based on user feedback, making it a dynamic tool for anyone looking to improve their health and fitness journey.