Yes, Exit Popups can appear on mobile devices! If you choose to enable Exit Popups on your Page, it can appear on both or either, mobile and desktop devices.

However, for your Exit Popup to display on mobile devices, you must configure the Timed Reveal.

The Timed Reveal displays the Exit Popup after your specified number of seconds from the time your site visitor opens the Page. Learn to configure the Timed Reveal settings for your Exit Popup. 

Configure the timed reveal settings

• In the page you wish to customize, select Exit Popup.
• Click Edit Exit Popup to show the exit popup as you edit.
• Check Enable Exit Popup.
• Open the Exit Popup Settings.
• Locate the Timed Reveal text box.
• Enter your desired Timed Reveal in seconds. 
• Before saving, be sure to uncheck the Edit Exit Popup.
• Click Save to keep your changes.
• Navigate to the top right corner of the sidebar to Preview your Exit Popup on desktop:

Learn more about customizing your timed reveal settings