Part of the iDo4U suite of applications, iPetSit4U is a great resource to help pet sitters of all ages to keep up with and track information about families they petsit for. Keep emergency contact info, names of pets, medications, and other information close at hand and in one convenient location. Add petsitting jobs into the calendar from the application, and be able to share that calendar with your parents or anyone else who may need to know your schedule (requires iCloud calendars to be enabled). There is also a handy journaling feature that ties to each family.