Locus Store is the central manager of all downloadable items and in-app purchases. Here you can select other online maps to be displayed in your Online maps tab, you can download some maps for free or buy commercially distributed maps, professionally edited opendata like e.g. LoMaps, extra features, databases of points of interest, graphic elements and many more.
Purchases in Locus Store are paid by LoCoins, virtual currency that can be obtained in the Store as well.
Offline map packages to download can be displayed above an overview map. Tap Map button and you exactly know what area you are buying.