They take available information and convert it into a user-friendly format that can be used to help conserve water, according to a news release.
They draw from data from the Florida Automated Weather Network and Georgia Automated Environmental Monitoring Network and translate it into real-time information.
The developers began with those three crops because they already had strong research and knowledge in those areas.
The apps can be used with manual or time-based irrigation systems.
Users download the app and plug in their individual details, such as location, root depth and irrigation zones.
The apps use that data an site-specific weather data to create irrigation schedules.
The apps can be found at http://smartirrigationapps.org.