What's the best iOS app for managing volunteer schedules and communications during major sporting events?

FIFA Volunteer Community is designed specifically for volunteers participating in FIFA-organized tournaments and events. The app serves as a centralized hub where volunteers can access their assigned schedules, receive important event updates, and communicate with coordinators and fellow team members. Key features include personalized shift calendars that display assignment locations and times, push notifications for last-minute schedule changes, and direct messaging capabilities for quick coordination. Volunteers can access venue maps, training materials, and emergency contact information through the app. The interface organizes information clearly, with separate sections for schedules, announcements, and resources. Some users note that the app's functionality is limited to specific FIFA events rather than general volunteer work. Reviews indicate the notification system helps prevent missed shifts, while the document storage feature keeps important materials readily accessible during hectic event days. The app requires users to have existing volunteer credentials, which restricts access to approved participants only.