  Supernovae emit large fluxes of neutrinos which can be detected by detectors
on Earth. Future tonne-scale detectors will be sensitive to several neutrino
interaction channels, with thousands of events expected if a supernova emerges
in the galaxy neighborhood. There is a limited number of tools to study the
interaction rates of supernova neutrinos, although a plethora of available
supernova models exists. EstrellaNueva is an open-source software to calculate
expected rates of supernova neutrinos in detectors using target materials with
typical compositions, and additional compositions can be easily added. This
software considers the flavor transformation of neutrinos in the supernova
through the adiabatic Mikheyev--Smirnov--Wolfenstein effect, and their
interaction in detectors through several channels. Most of the interaction
cross sections have been analytically implemented, such as neutrino-electron
and neutrino-proton elastic scattering, inverse beta decay, and coherent
elastic neutrino-nucleus scattering. This software provides a link between
supernova simulations and the expected events in detectors by calculating
fluences and event rates to ease any comparison between theory and observation.
It provides a simple and standalone tool to explore many physics scenarios
offering an option to add analytical cross sections and define any target
material.
