AREA. Google Play

You can get the area and plane of a polygon following each of its vertices and getting its positions with the GPS of a mobile device.

The application displays an estimation of absolute error and the relative error in the measurements.

Because GPS positions have an error, the  application is not useful for measuring small areas.

The app is helpful  for the estimation of:
- The areas of land in agricultural or forest crops.
- Land areas when there are not sight lines between vertices.
- Water areas on the sea.

In other cases, you should seriously consider the relative error in the measurements.