Radar Covid: what is and how does the app that tells you if you have met someone with coronavirus works

Radar Covid, the application that has been developing for some time and has been tested in the Canary Islands and informs you of what is your risk of having been infected by coronavirus by analyzing the data of the people with whom you share a space smaller than 2 meters for more than 15 minutes in the last two weeks. Very useful information in these times of perpetual mask. We tell you how it works and why you should have this application installed on your mobile from today.

How Covid Radar works and what it is for

As in the Korean series Love Alarm, our mobile takes care of everything (in the case of Netflix to meet our love and in the case of Radar Covid to find out if we have been close to a positive). Your you just have to install the app on your mobile and activate bluetooth and our mobiles are communicating with each other saving the information, only, of those mobiles that are in a range of two meters for more than 15 minutes (the two parameters that compromise social distance and facilitate the transmission of the coronavirus) for 14 days.

The Radar Covid app sends you an alert if any of your recent contacts receive a positive diagnosis.

The key to the success of the system is that when a person tests positive in a PCR and have a firm diagnosis of being infected in your medical report, a password will also appear that you must enter in the app that you have downloaded on your mobile. In this way, people who have met that person for more than 15 minutes will receive an alert on their mobile phones that will inform them that they have been in contact with someone who has tested positive.

How does Radar Covid use the data?

The application does not geolocate you (although it is true that among the permissions it requests for its installation is that of the location, but then it does not use it) nor does it share data with any other user with whom you interact or coincide. The objective is that the app makes a record of contacts, it does not know who you are with or with whom, but what devices have been close to your mobile.


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In the data that our mobiles use to "talk" to each other there is neither our telephone number, nor our name nor any other way of identifying ourselves. In order for our telephones to communicate, a completely anonymous and random identification code language has been developed (in fact, we ourselves do not know our encrypted number). Nor will we be able to know who has tested positive or the positive to know who he could have infected while he had no symptoms.

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