Whatsapp

My users of the iphone when they try to share a dashboard by "watsapp" they only see the dashboard link wording.  If they use "whatsapp" in Android, then Android shares the link wording and the image (snapshot) of the dashboard.   Do you know if "whatsapp" app works for the iPhone?   I already have the most recent version of PowerBI app downloaded on the iPhone. 

Thank you for your help.