GridMaps is a simple, ad free app that can create dynamicly generated random maps made up of biome tiles. It also allows you to edit any map after it's been generated by the app.

These maps are useful for Dungeon Masters running campaigns, as they allow you to easily keep track of where the party is on the world map.

Because you can export your maps as images, you can then send them to players or print them out at-will.

Can be used to create a map for your fictional world building, eg. Books, D&D or other role-playing games.