To ensure the best streaming experience for our users, the Hulu Plus application is supported on iOS 5.0 or above. Make sure that your iOS device is updated to the most recent software. You can do this by opening the Settings app, selecting General and then Software Update. If this option is not available, you can update your device by connecting your iOS device to your iTunes account via your computer.
We recommend that you use iTunes or iCloud to back up your device prior to an upgrade.