Since we are with NAVIGON we are going to talk about what is possibly the best trick that exists for this application if we have the European version and we want to save space: it is about deleting the maps that we do not use.
For this we will need to access the iPhone through a file manager or SSH (my case), specifically this route:
/ private / var / mobile / Applications
Once inside that path you will have to look for your NAVIGON application, enter the navigon.app folder, go to the maps folder and there delete those that you are not going to use without any fear.
if the others occupy that ,,, 204kb hahaha I do not know too badly to be from memory to scratch ...
In any case, I am left with the Iberian version, I do not leave here. and it sure takes up less than the European version.
Is that the capture that I have put is mine, that I have deleted them for a long time, but for example France takes a pass not to use it (although I leave it because I go there a lot)