Vertical Calendar is a free iPhone app developed by Masaya Kato. It falls under the Business & Productivity category and offers an ultra-simple calendar experience that is accessible to anyone. With its clean and intuitive design, this calendar app aims to make organizing your schedule effortless.

One of the standout features of Vertical Calendar is its ability to adjust the size of the list. Users can choose between small, medium, and large sizes, allowing for a customizable viewing experience. Additionally, the app offers the option to change the list display line, with choices of 1 line, 3 lines, or all lines. This flexibility ensures that users can easily tailor the calendar to their preferences.

In addition to its primary function as a calendar, Vertical Calendar also includes a memo feature. This allows users to conveniently jot down notes and reminders alongside their scheduled events. The app's focus on simplicity and ease of use makes it a practical choice for individuals looking for a straightforward calendar solution.

Please note that the developer information and contact details are not provided in this review.