The Immunization Tracker app allows the user to track the immunizations given to multiple people. The user can enter the names of people receiving immunizations in one picker and the names of the immunizations in a second picker. The second picker is pre-populated with common vaccinations. A third picker contains customizable dates. The user can then use the three pickers to select the patient, immunization and date the vaccines were received. These entries are shown in a list, which can be sorted by patient name, immunization and date. A built-in edit function allows the user to delete entries from the list.