Most systems used for monitoring patients with Alzheimer's disease are based on GPS, RFID. These technologies are still costly in comparison with the Beacon.
This APP is able to monitor people with disabilities, especially with Alzheimer's, simply and efficiently.

Below is an article about how to keep the Elderly under surveillance:

"Elderly who disappeared after going to the fair is still missing in Goiania"
"He suffers from Alzheimer's disease and was last seen on 29 May.
Family reported to the police and campaigns to try to find man "
"The retired Nagib Pacheco da Silva, 75, who has been missing since last May 29, has not yet been found. The old disappeared after going to a show with his wife, Geraldine Rodrigues, in Sector Solange Park in Goiania. According to the family, he suffers from Alzheimer's disease and they fear that he did not remember more than where you live. "
"Nagib had been diagnosed with Alzheimer four years ago, according to his grandson. Retired took medication to control the effects of the disease, but still suffered from loss of recent memory. Relatives say that he had never gone or presented any outbreak, since the disease was discovered early. "

The Beacon is a small transmitters used to identify and determine the positioning of smartphones (and compatible devices) in a given location. Moreover, they work with common batteries that can last up to 2 years. Ie can be used in discrete and efficiently in various scenarios.

iBeacon uses Bluetooth Low Energy (LE) for the recognition of the devices. The iBeacon name is the brand created by Apple to identify the implementation that has made technology.

All iOS 7 (iPhone 4S, 5, 5C, 5S, iPad 3, iPad Mini) devices support the technology. But there are many compatible Android devices as well. Basically, all that are with version 4.3 or higher will be able to interact with iBeacons. This includes Samsung Galaxy S3, S4 and S5, HTC One Nexus 4, 5 and 7, for example. This APP was tested on a Galaxy S4, S5 and S6.

This APP was able to communicate with the Beacon at a distance of up to 50m independent of environmental conditions, as the transmission of signals is local and direct.

- First, you must locate the APP Beacon device. For this, you must select the largest number, the lower and the GUID of its Beacon.
- On Alert screen you can parameterize the type of alert, send SMS and distance alert.
- On the Monitor screen you can view in real time each Beacon.
- Click Start and you already start to monitor.