I’m sorry to hear that you want to uninstall the app. It would be great if you could let us why you decide to not use this app anymore. Please help us spend some minutes to let us know by sending an email to firstname.lastname@example.org.
Please follow this guide below to completely uninstall the app from your theme. You go to Theme Integrate > Select the theme you’ve applied the app > Uninstall
Next, you just need to remove the app from your app list.