This app includes topographic maps around Helsinki area (scales 1:50 000, 1:100 000 and 1:250 000). Size of the area is 192 km x 144 km. See support page for detailed description of the area. Using the app doesnt require an internet connection. You can use pinch zoom or zoom in by double tap and zoom out by two finger tap.
Search list includes over 11 000 place names. Heading button shows where the device is heading: 0° is grid north, 90° east etc.
With Location button you can load a map centered to your location. Your coordinates are shown in blue numbers and center of the screen is shown in black numbers. Gray grid has different size depending on zoom factor. You can see the grid size in the title bar. You can save the map to Photos app and for example email it from there.
App contains data from the National Land Survey of Finland Topographic Database 10/2014: NLS topographic raster maps 1:50 000, 1:100 000 and 1:250 000 and NLS map names 1:100 000. National Land Survey open data licence: http://www.maanmittauslaitos.fi/en/NLS_open_data_licence_version1_20120501
Please see my other map apps too.