A free app for Android, by AppsMi Studio.

Land Area Measurement – GPS Area Calculator App is an app for measuring fields, plots, roads, and the distance between them. It is a useful tool for farmers, surveyors, builders, land developers, and anyone who needs to measure and calculate areas and distances. It is a handy area measurement app for Android. 

The measurement itself is pretty simple. First, select the points or objects you want to measure. The distance is calculated and displayed on the screen. It is very easy to use and has a user-friendly interface. The measurement itself is based on GPS, so it is accurate and reliable. The app has different units available for measurements and conversions.