A free app for Android, by Esri.

Gathering and analyzing geographic data has never been made easy with the help of ArcGIS Collector. It’s an app with an intuitive interface that allows field workers of all experience levels to fill out forms, capture, and return accurate field data using their android phones.

With this app, not only will you be able to collect and update data using the map or GPS, but you can also download map areas to your device so you can work offline.

Inside the app, you can search for places and coordinates, as well as collect points, lines, areas, and other geographical-related data.

You can even attach photos and videos, and fill out easy-to-use, map-driven forms.