Are you a precise IP, the app works perfectly. But if a DynDNS address is entered, the app is not working. Who manages the IPs via a DynDNS service its Cams, is in a fix. That's according to my tests so far the shortcoming of all the free tools. The tool at my purchased from Amazon Wansview cameras worked uncomplainingly with DynDNS HTTP addresses. If someone has an idea what I'm doing any wrong, I am willing to distribute more stars.