How is it possible?
Resultly makes it possible.
What Is Resultly?
Resultly allows you to follow virtually any interest you have from across the internet and be notified in real-time of new information or changes about your interest.
For example, if you were looking for an apartment, you would simply add the details of the apartment you are looking for as an interest into the Resultly App.
As soon as new apartments are listed anywhere on the internet that match your interest, you will be immediately notified via the Resultly App. Supports push notification for all your interests.
Best Part Is:
By adding something to your interest list, you can be notified, literally to the minute, as soon as something is posted on the web that matches your interest and the criteria you specified.
More at: http://www.result.ly/