I payed for the full version and downloaded it on my old iPhone 4 and new 6. The concept in theory is great but afyer setting it up,trying it over the last two day I found that it worked for 2-3 minutes then crashed each time. I tried closing and opening the apps multiple times, loging in and out of my account but every time the cameras would start and then one of the connections would drop. I have an 150mbps internet connection so it is not a connection error. I found this app more frustrating then helpful. Needing a Mobil monitor my wife and I have set one of our phones near the baby and brought the other in he other room. After we call each other on skype and mute the mic on the phone we have with us. This was free and gave us a great free tool.