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  • Tag
  • Main Screen
  • Configuration menu
  • Tutorial
  • Tags reading
  • Different tags

What is it about:

Date of publication: 04/12/2018
Navilens is a system to facilitate the mobility of people with reduced or no vision.The system consists of labels with color codes similar to bar codes or QR codes that are located in the points that you want to identify or in which you want to place relevant information for the user.

These codes are read by an application that makes use of the mobile termination camera. The information obtained from each label is read by voice.

The advantage over other similar methods is that these codes can be read at much greater distances than traditional code systems.


Forms of acquisition:

The manufacturer's website where you can find more information is:

You can download the free version of the android application by clicking on the following icon:

You can download the free version of the application for IOS by clicking on the following icon:

The use of the application to read labels has no cost to the end users. In case of being a company or entity you can contact the company to find out a quote to tag your space in the following email:


Technical verification:

We have tested the system of accessible labels Navilens in our facilities and we tell you how has been the experience in the following lines.

The first step to make use of the tags is the download of the application in its version of Android or IOS that is easily found in both application stores and is free download.

It is important to remember that for a better user experience it is recommended to activate the screen reader, although the application makes use of voice reading automatically, the activation of the screen reader facilitates interaction with the application.



Once all these steps have been carried out and without obstructing the rear camera of the phone, we proceed to read a series of labels that we have placed in our facilities that contain pre-loaded information specifically for each location.

The labels are identified by traversing the environment with the camera. The reading of the labels depends on the camera of the mobile phone used, with a terminal IPhone 6 or Samsung of medium range the reading distance is effective enough to identify the labels in the environment, being of an average of 4 meters, and having reached readings at distances of up to 10 meters. However, this correct reading also depends on a large extent on the print size of these labels.

As the camera identifies new labels in the environment, the application reports its position to better orient the camera and know its exact location (Right, left, center, very close ...). Once a tag is identified, the application reads the information associated with that tag when we shake the phone. The information of each label can be modified by the company or entity in charge of the space through a web portal in real time with a cost associated with the service, although it is important to note that the reading application is free download and has no associated cost for the end user.

The application is easy to use and in a short time we can familiarize ourselves with the main functionalities. It is possible to read the information of the labels in different languages ​​depending on the language in which we have configured our phone.



In terms of accessibility there is little to say, the application is properly labeled and allows its full use with screen readers in both Android and IOS. In addition, the graphic menus present a high contrast for those users with partial vision who do not use the screen reader.

The quality of the information associated with each label depends on the time it takes the manager of the facilities to update the content of each label so that they reflect the reality of the space and provide clear and concise information. In any case, as users of the application, we are not responsible for the management of this information and we can only read it.

In general, the reading of labels has been satisfactory in the tests, taking into account, as we mentioned above, that the better quality of the camera and the larger the size of the labels, the better results are achieved. The addressing instructions have allowed us to focus the phone until detecting the centered location of each label, walking towards them until we receive the indication that we are close to it.



Battery consumption is high if the application is used continuously because it uses, among other functions, processing, internet connection and camera. The consumption is increased if the flash functionality is used, which allows to illuminate with the light of the flash the areas to be identified by the camera if the environment does not have good lighting conditions.

There is one thing that it would be advisable to indicate more clearly, it is the indication of when the camera is on and when it is not, for this it is important to make sure that the application is not running in the foreground and has been closed. Although in this aspect it is good to comment that the images of the camera are not shared externally, but that the treatment of the image is done internally in the terminal.



It is important to note that the application is capable of operating without an internet connection when having memory, as long as we use it to recognize labels that we have previously identified with connection.

In summary, the tag system and its associated application facilitate the obtaining of information in different languages to facilitate the guidance and identification of the environment for people with vision difficulties. The application is easy to use and as long as this system extends widely


  • The innovative of a system that allows reading codes at a greater distance than other systems and guiding the phone to be guided by them
  • The great usability and accessibility of the application
  • The free cost for the end user

Improvement points

  • The fact of depending on the manager of the facilities and having a cost for it, means that the system is not currently implemented in many spaces
  • The fact of not having in the application a list of the facilities identified with these labels in which to be able to use the app
  • Battery consumption is high if continuous use is made
  • Design and manufacturing: 4 sobre 5(4/5)
    Refers to the physical aspects and details of the manufacturing of the technological product.
  • User Experience: 4 sobre 5(4/5)
    This criterion is linked to the user's assessment of the product or application.
  • Technical features: 4 sobre 5(4/5)
    Description of the quality of the technical specifications of the technological solution.
  • Accessibility: 5 sobre 5(5/5)
    It is the degree to which people can use or access a product, technological solution or service, regardless of their technical, cognitive or physical capabilities.

Social valuation:

Hemos valorado la lectura de códigos con la aplicación Navilens con nuestro voluntario Andrés, especializado en la valoración de productos para usuarios con visión reducida y nula.

En general las impresiones de Andrés son muy positivas considerando el sistema de lectura de etiquetas una forma innovadora y útil para facilitar más que un guiado automático, la obtención de información importante para moverse de una forma autónoma por determinados espacios.

El aprendizaje en el uso de la aplicación no ha requerido casi tiempo y la interacción con el lector de pantallas de IOS ha facilitado un uso sencillo.

Andrés pone el foco en la información y la forma en la que esta se recibe. Para él es muy positivo que los gestores de los espacios puedan modificar las informaciones en tiempo real para reflejar los cambios en el entorno con relativa agilidad.

Respecto a los contenidos recalca que no podemos pasarnos con la cantidad de información que se introduce en cada etiqueta en el caso de las etiquetas destinadas al guiado.  Tiene que ser una información importante pero que no sature al oyente.

En el caso de etiquetas de tipo explicativo para zonas expositivas podemos incluir una información más extensa sin que esta nos sature tanto.

En nuestro caso han resultado más útiles las etiquetas más generales que dan información de todo lo que vamos a encontrar en una zona, que etiquetas demasiado concretas en cada pequeño detalle. Para Andrés es muy importante referenciar las informaciones con datos de localización del tipo (primera puerta a la izquierda, segunda salida a la derecha, de frente)

Se debe tener cuidado con las comas y los puntos a la hora de introducir la información de cada etiqueta porque produce pausas a la hora de que el lector de pantalla nos de la información.

La distancia de detección con la cámara de un terminal Iphone 6 es buena, especialmente con etiquetas de tamaño grande. Lo idea tras lo observado en las pruebas es intentar colocarlas en una altura de aproximadamente 1,5 hasta 2 metros del suelo.

El consumo de la batería durante las pruebas ha sido elevado sin hacer uso del flash.



  • Impact and utility: 4 sobre 5(4/5)
    Describe to what extent the functionalities of the product are useful and impact on the improvement of the user's life.
  • Usability and accessibility: 5 sobre 5(5/5)
    Possibility of the device to be used, understood and used in equal conditions for any person.
  • Design and ergonomics: 4 sobre 5(4/5)
    Assessment of how the design of the technological solution adapts to the person to achieve greater comfort and effectiveness when using it.
  • Ease of acquisition: 4 sobre 5(4/5)
    It refers to the possibilities of accessing and acquiring a technological solution by the user.

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