Software apps and online services
I am a traveling man. After a long day journey, travelers all want to have a comfortable and safe break. However, some inns or hotels are not safety, although they have locks on the doors or windows. Because of this reason, Hodor comes.
Some one may knows that the name of "Hodor" came from the book "Game of Thrones", which means "Hold the door".How Hodor works
Just paste the Hodor on the doors or windows, and press the button. When some one wants to open the door or window, Hodor will know that, and of course, warn you immediately.
In fact, when you press the button, Hodor will initialize the data of location. when some one open the door or window, Hodor must move with the door or window together, so the location is changed. When the changing data is bigger than a threshold, the alarm is triggered！