TimetableForWeb is a free Chrome add-on developed by Sungho Hwang. It falls under the category of Browsers and is classified as an Add-ons & Tools subcategory. This simple timetable application allows users to view their timetable in a window popup using Windows APIs.

The main feature of TimetableForWeb is the creation of a new indexed database for storing the timetable. Users can create a new object store within the database and add new records to it. The data in the records can be updated by filling in the input fields and clicking the "Save" button. The application automatically displays the data in each input field, saving storage volume by updating existing records instead of adding new ones.

TimetableForWeb is designed to display the previous schedule and update the current and future schedules. It provides a convenient way to manage and update timetables without the need for cumulative records. Storage permission is required for the application to function properly.

Overall, TimetableForWeb is a simple and efficient tool for managing timetables on the web. It provides a user-friendly interface and easy-to-use features for creating and updating schedules.