Locago MapLoader 1.4.0
the author of this app says:
Download maps country-by-country to the local search app Locago with MapLoader. The MapLoader cuts data costs and improves performance, especially when out of network coverage. Wifi or data plan is recommended when downloading. Version 0.13.0 or later of Locago is required. Map data (c) OpenStreetMap contributors, CC-BY-SA.