AnyCal is a free iPhone app developed by Shinichi Aokawa that allows users to create calendar wallpapers using their own photos. With the ability to display two months on the calendar, users can easily add a calendar to their wallpaper. The app also integrates with "MyHoliday" to include holidays on the calendar.

Users can simply follow a few steps to create their customized calendar wallpaper. They can select an image from their photo library, adjust its position, add a calendar, preview the wallpaper, and save it with the click of a button. AnyCal streamlines the process of setting up personalized wallpapers for users looking to add a touch of organization and personalization to their device.