Thank you for reaching out to us! That is a great question. Both desktop and mobile opens are definitely tracked as a standard within Constant Contact. You can click here to read more about how opens work and when they might not be as accurate. If you see on a particular email or on multiple emails that the tracking of Opens is not working, we want to take a look at it! You can either call our support team at 855-273-0449 or send us an email at Social_Support(at)Constantcontact(dot)com. Please let us know how we can be of further assistance!