View maps from OpenStreetMap (app is not affiliated with OSM organization).
Choose your own tile server.
Preload tiles for offline use.
Set place markers, take photos.
Record, import and export tracks in gpx format.
Free use, no ads.
This app is open source. The code can be found at https://github.com/mr-elbe5/SwiftyMaps
Further information on https://en.elbe5.de/maps.html