According to "Can smartphones replace house keys?" in the Week magazine on July 6, 2011, a new smart phone application allows you to lock and unlock your home through the internet. This application helps a lot of people who are always driving miles back home just because they forgot to lock their doors or inviting people over without leaving the coach. This new invention like any new modern tool has some advantages and disadvantages which will be explained.
Humans like the easy way of doing their daily activities. This app will help many people in many ways such as replacing key chains or at least some of them. Another advantage is that no more copying keys for friend or roommates, where everyone can have his own app version. Since this app works using the internet, it means it can be used even from far distance like letting the plumber in the house while staying in the office.
On the other hand, as any new invention, perfection might take time to be reached. Because this app is used by the internet, it is more likely that "internet nerds" can easly hack and reincrept passwords and codes and another issue is that any problem with the internet would cause a user to be locked out of his home. In addition, by using an electronic device electrical connection has to be present all the time.
As a summery, I think this will be a very great application in the future but not for the mean time. As a user I think I will not use it now, but i will wait until a newer and a better version appears.