The Cool Fire Calendar is the work of a 30 year firefighter/programmer. It is the best shift calendar available and is designed for Firefighters, EMS providers and their friends and family members. The calendar is simple to set up and incorporates five very common shift schedules including; 24/48, 48/96, 3s & 4s, 4s & 6s and 5 & 6s. The Calendar allows you to set a default schedule but also keep track of other Shift schedules in the event a friend or family member works a different schedule. The Cool Fire Cal makes it easy to post and view multiple entries to any day. A calendar entry can have a time associated with it or if not defaults to "ALL DAY". You can also select from three entry colors (red, green blue) to help identify classes of entries (think work, family, exercise, school, etc) if no choice is made it defaults to green. The main calendar screen alerts you that you have a calendar entry on that day by posting a small red, green or blue dot below the date on the calendar. Clicking on the day on the calendar creates a pop up window at the bottom of the calendar with a scrolling list of entries for that day. Deleting the entry or changing it is a snap just click the delete or edit buttons in the right margin of the scrolling list. Please remember that if you have a problem e-mail me at email@example.com before you write a bad review. Use all caps in the subject of the email so it catches my eye. Apple is constantly upgrading their platforms and operating systems and sometimes it takes me a couple weeks to upgrade my application. Please try and be patient. I am a firefighter like you not a big corporation. I am sure you will like the Cool Fire Cal and agree that it is the coolest Fire/EMS calendar around! Give it a shot!