RiverFlows offers a quick and easy way to view data from river gage sites using an Android device. This is useful for fishing, kayaking, rafting, canoeing, or any other pursuit that requires tracking lake and river levels in the U.S. Supported Data Sources: USGS NOAA US Army Corps of Engineers Colorado Department of Water Resources California Data Exchange Center The Riverflows app and widget are now open source!: https://github.com/robinmj/riverflows