MyWell is a smartphone app for collecting and analysing depths to groundwater water level, rainfall amount, checkdam water level and water quality data. The app was developed in the MARVI project (www.marvi.org.in), and it is intended to help in crowdsourcing data for easy reporting and sharing. The app can be used by anyone who is interested in collecting water data in any part of the world to better manage groundwater for their local situation.