Pie Chart Time Management is a free iPhone app developed by Kazuya Kobayashi. It falls under the category of Business & Productivity. This app allows users to effectively manage their time, schedule, and habits through the use of a colorful pie chart. In addition to the pie chart, users can also view their schedule on a calendar.

The app features a beautiful and colorful calendar that displays everyday's records. As users record their schedule or activities, the calendar gradually fills up with the records, providing a visual representation of their productivity. Users can also view their old records, allowing them to track their progress over time.

Furthermore, the app offers a detailed day record feature. By tapping the "Edit" button on the calendar or double-tapping a specific day, users can access the day record detail screen. This screen provides a clearer and more comprehensive view of the day's activities. Users can input their records directly from this screen, making it convenient and efficient to document their daily tasks.

One of the standout features of Pie Chart Time Management is the ability to customize colors. Users can select and customize the colors for each record, creating a visually appealing and personalized calendar. The color selection can be done directly from the input screen, allowing users to create a calendar that suits their preferences.

Overall, Pie Chart Time Management is a user-friendly and visually appealing app that offers effective time and habit management. With its colorful pie chart, customizable colors, and detailed day record feature, this app is a valuable tool for users looking to optimize their productivity and organize their daily schedules.