In this session we will introduce the main features of Mapeo Mobile, a free, open-source mobile app for collaboratively gathering monitoring and mapping data. It can be used to collect a range of data, for example evidence of illegalities happening on your lands for legal or advocacy purposes, or to collect information about historical territory use for land claims. Mapeo is easy to use and is built around community-led processes and local data management, and can be customised for local data needs, languages and iconography. Mapeo Mobile works fully in offline, remote environments, and you can keep control of all the data locally, without need for an online server or external data repository.