ETo Tool is an easy to use Excel application for estimating reference evapotranspiration using several methods that require different levels of data availability, that allows to easily compare the estimation accuracy of two selected methods, namely comparing less weather data demanding methods.
You can download it here.
ETo App is an easy to use Android App to fetch reference evapotranspiration (ETo) using weather data from Open-Meteo. ETo can be fetched for your current location using GPS, by choosing a point on the map, or for a previously saved location. You can get up to 7-day weather forecast and 5-day historical data including temperature, rainfall, and ETo.
You can download it here.