Wemoji app uses the Facebook login and we do not save your personal data in our server. As per Facebook policy, we have to provide User Data Deletion Callback URL or Data Deletion Instructions URL.
If you want to delete your activities for Wemoji app, you can remove your information by following these steps:
Go to your Facebook Account's Setting & Privacy. Click Settings.
Look for Apps and Websites and you will see all of the apps and websites you linked with your Facebook.
Search and click Wemoji in the search bar.
Scroll and click Remove.
Congratulations, you have successfully removed your app activities.