An apparatus for interaction and communication comprising: an external LED panel connected to an electronic user device; the external LED panel further comprising: connection means (11a, 11b, 10b, 10c) compatible with the electronic device, a LED display (12, 10a) and, at least, one anchoring and supporting element designed to orient the display (12, 10a) towards a position visible by third parties (101, 102, 103); and the electronic user device further comprising a screen; one or more processors; a memory; and one or more programs (132 to 146) wherein the program or programs (132 to 146) are stored in the memory and arranged to be executed by means of the processor or processors; wherein the program or programs (132 to 146) comprise a user interface module arranged to control the user interface of the electronic user device; and wherein the user interface module comprises: a locking module arranged to detect the situation of meeting any of one or more conditions for transitioning the electronic user device to a user interface locked state and for transitioning the electronic user device to a locked state; and a release module arranged to detect the situation of meeting any of one or more conditions for transitioning the electronic user device to a user interface released state and for transitioning the electronic user device to a released state; and wherein the external LED panel allows visual intercommunication between different portable electronic devices by means of encrypted messages and sending files; and wherein the external LED panel comprises a no distraction mode, which is conceived for meetings or classes in classrooms where the user of the external LED panel is in a program or use such that the remaining programs or actual warnings of the electronic user device are locked; and wherein the use of the external LED panel is possible for a notice to request the right to speak in meetings or classes; and wherein the programs (132 to 146) further include instructions for: emitting through the external LED panel at least one visual message corresponding directly with the activity of a user in the electronic user device; and sending messages that are coordinated between different external LED displays. an external LED panel connected to an electronic user device; the external LED panel further comprising: connection means (11a, 11b, 10b, 10c) compatible with the electronic device, a LED display (12, 10a) and, at least, one anchoring and supporting element designed to orient the display (12, 10a) towards a position visible by third parties (101, 102, 103); and the electronic user device further comprising connection means (11a, 11b, 10b, 10c) compatible with the electronic device, a LED display (12, 10a) and, at least, one anchoring and supporting element designed to orient the display (12, 10a) towards a position visible by third parties (101, 102, 103); and the electronic user device further comprising a screen; one or more processors; a memory; and one or more programs (132 to 146) wherein the program or programs (132 to 146) are stored in the memory and arranged to be executed by means of the processor or processors; wherein the program or programs (132 to 146) comprise a user interface module arranged to control the user interface of the electronic user device; and wherein the user interface module comprises: a locking module arranged to detect the situation of meeting any of one or more conditions for transitioning the electronic user device to a user interface locked state and for transitioning the electronic user device to a locked state; and a release module arranged to detect the situation of meeting any of one or more conditions for transitioning the electronic user device to a user interface released state and for transitioning the electronic user device to a released state; a locking module arranged to detect the situation of meeting any of one or more conditions for transitioning the electronic user device to a user interface locked state and for transitioning the electronic user device to a locked state; and a release module arranged to detect the situation of meeting any of one or more conditions for transitioning the electronic user device to a user interface released state and for transitioning the electronic user device to a released state; and wherein the external LED panel allows visual intercommunication between different portable electronic devices by means of encrypted messages and sending files; and wherein the external LED panel comprises a no distraction mode, which is conceived for meetings or classes in classrooms where the user of the external LED panel is in a program or use such that the remaining programs or actual warnings of the electronic user device are locked; and wherein the use of the external LED panel is possible for a notice to request the right to speak in meetings or classes; and wherein the programs (132 to 146) further include instructions for: emitting through the external LED panel at least one visual message corresponding directly with the activity of a user in the electronic user device; and sending messages that are coordinated between different external LED displays. emitting through the external LED panel at least one visual message corresponding directly with the activity of a user in the electronic user device; and sending messages that are coordinated between different external LED displays.