A. 1. Force close the app by swiping up from the bottom of the screen and swiping the app off the screen. 2. Restart your iPhone to clear any temporary glitches. 3. Reopen the app and check if it is responsive.
B. 1. If the app continues to freeze, check for updates in the App Store and install them. 2. Consider clearing the app's cache if the option is available.