In reply to raliadsa skcalbwah:
It's hard finding an app with good quality maps to use "everywhere"... Quite often the everywhere bit is just taken from a generic source like OpenStreetMap, which is prone to errors, especially in Alpine or other mountainous regions, and not detailed enough. Good map sources are expensive to make...
For example, there aren't any real craters in Totes Gebirge, Austria, as depicted here on OpenStreetMap (and several other map apps as well)
https://www.openstreetmap.org/?mlat=47.7081&mlon=13.9904#map=15/47.7081...
Fortunately, some countries have their own, very detailed GIS maps, available online and as apps - some for free - as an OpenGovernment initiative.
A short list of ones I like:
Switzerland:
https://map.geo.admin.ch/
free app available (Swiss Map Mobile), up to very detailed 1:10000 (!) maps. Free version can only download 10km area for offline use, subscription available for bigger downloads. Website allows unlimited printing to pdf up to A3 at 1:10000. Can also show coloured slope angles for over 30 degrees and other data like measured snow depth. Really excellent resource for Swiss Alps, and includes still quite detailed maps of the bordering Italian and Austrian areas. An example: https://s.geo.admin.ch/801cab5632
Austria:
https://geoland.at or https://basemap.at (free OpenGovernment project) have a very detailed shaded relief (DEM) map, which can be quite useful for planning (online only).
Overall Alpine maps:
https://outdooractive.com - used to be very good (with paid OutdoorActivePro, good maps based on Austrian and German official maps), but now they moved to a hefty subscription model of 30/60E per year. For the 60E, you also get the excellent alpine maps by OEAV/DAV/...The free version has been dumbed down, offering only OpenStreetMaps
AlpenvereinAktiv - the very same app as above, just in German.
However, AlpenvereinAktiv still has two versions on the AppStore - the new one (subscription model) and the old one, which allows offline saving and offers the OutdoorActive map layer (often quite better than OpenStreetMap) and slope angle overlay.
I suggest you download and use the older version, while it is still available...