After the installation the main Locus screen with open main menu appears: You can slide the menu back to the left and proceed with the main screen or try the Menu items - Maps, Points, Tracks etc.
The screen is covered by an online map which Locus Map automatically selected by the country you are in at the moment of installation. E.g. Hungarians see Turaterkep Classic map, New Zealanders NZTopoMaps, USGS maps are displayed to the US users etc. Anyway, you will never be left without a map, provided you are still online.
Keep in mind that your phone GPS must be on. If you're not sure how to do it, look here >>
Make sure you are connected to the internet when you use online maps!
The order and functions of first six buttons can be changed by long-tapping them and selecting. See more in the Main Menu settings >>