iOS: You have a lot of options for calendar apps in the iTunes App Store, but Shifts does things a little differently by catering for people who don't have the typical nine-to-five schedule.
As the name suggests, Shifts allows you to quickly add different hourly shifts to your calendar so it's easy to keep track of when you work. If you have a specific rotation, you can automatically add shifts, or just do it manually. From there, you can share your schedule with others, add notes, or set up reminders. You can also input your hourly wage to get a better idea of how much you'll make over the course of a month.
It's a simple app, but it's a great way to keep track of your work schedule without finagling a regular calendar app to do your bidding.
Shifts ($2.49) [iTunes App Store]