Maps of Catalunya Spain
The best topo maps of the Catalunya region of Spain are those produced by Institut Cartogràfic i Geològic de Catalunya (ICGC). Try zooming in here for example http://www.icc.cat/appdownloads/
The ICGC has apps for both Android and IOS which use this mapping but the apps are very basic and limited in what they can do. A better bet is the Android app Backcountry Navigator, which can download the mapping. However, I should much prefer to use Locus and therefore wonder if it's possible for the powers that be to include the ICGC maps as a downloadable option?