 CollectEarth is a free and open source software for land monitoring developed by the Food and Agriculture Organization of the United Nations, FAO. It uses Google desktop and cloud computing technologies to make data from multiple sources accessible and usable. This includes archived satellite images from Google Earth, Bing Maps, and Google Earth Engine, as well as images from Google Earth Engine code editor. Together, these sources provide users with a wealth of information about land dynamics around the world. CollectEarth also allows users to easily compare different types of imagery and analyze changes over time. Additionally, it provides tools for creating maps and reports, which can then be shared with other users. Finally, CollectEarth enables users to quickly identify areas of interest and monitor them regularly. This article was authored by Adia Bay, Alfonso Sanchez-Paus Diaz, Dine Maniatis, and others.