@Pabloincampo
Your freestyle will be in mg/dl so you need to divide by 18 to get the same readings as the ones used on here ( or vice versa,if you have a meter in mmol/l you will have to multiply the meter readings by 18 to see if the libre is in tune with your meter . Mines also in mg/dl because I am in France. Here's one of the reports from when I used mine last at the end of the year. My target is between 70 and 144mg/dl (ie 3.8 and 8mmol/l) you can set that by clicking on the cog and then it is(on mine ) the second option .Mine is in French so I can't tell you what the Spanish would be! The software can be set to English but it won't change the units.
Why don't you get a meter in mg/dl though? It makes it much simpler when you use the unit used in the country. I know from experience that it can cause confusion when a doctor asks you a simple question about what your glucose was and you give them an answer in units that they don't normally use.
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