Go Map!! is a powerful iPhone application that allows you to create and edit information in OpenStreetMap, the free crowd-sourced map of your neighborhood and the world. With Go Map, you can easily add points of interest such as shops, restaurants, streets, cycling and hiking paths, buildings, lakes, and rivers.

This application offers a range of features to enhance your mapping experience. You can quickly add points of interest, edit nodes, ways, and areas, and track your location and heading. It also allows you to create and resolve Notes, and supports arbitrary tag values. With full undo/redo support, you can make changes with confidence.

Go Map provides flexibility by allowing you to work offline and upload your changes later. It offers backgrounds from Bing, Mapbox, and Mapnik, or you can customize it with your own background. You can also see who last edited an object and when, and find other mappers nearby.

The application is completely free, with no ads or in-app purchases. However, it does require free registration and acceptance of the OpenStreetMap licensing terms to upload your changes. It's important to note that continued use of GPS running in the background can significantly decrease battery life.