A free app for Android, by Softwel.
SW Maps - GIS & Data Collector is a free, versatile, mobile GIS app. It can be used for a wide range of mapping and geospatial purposes.
It is capable of collecting location data and attribute information. It supports a wide variety of map types, such as Google Maps, Open Street Map, National Geospatial-Intelligence, and more. It is compatible with a variety of measurement types, such as distance, area, and area density. It can also support a wide variety of geospatial purposes, such as mapping, location discovery, navigation, and more.
It has a PROJ.4 library that supports many map types and measurement types. It can also import data from a PROJ.4-supported map. It is capable of recording and sharing data. It can also export data to a variety of formats, such as KMZ, shapefiles, and GeoJSON.
