On some devices, simply exiting the ABCmouse English app may leave some features running in the background. Fully closing the app helps ensure that all features of the app are turned off and the app can restart anew.
Android Phone and Tablet
To force stop the ABCmouse English app, go to Settings > Apps > All apps > ABCmouse English> and select Force Stop.
iPhone and iPad
Go to your Home screen > double-click* your Home button to bring up the multitask tray > and swipe up on the app's preview to force stop ABCmouse English.
*On an iPhone X or later, from the Home screen, swipe up from the bottom-left corner of the screen.