This app is designed to be most useful by assisting with performing respiratory calculations in a hospital setting. The app features several calculators: Currently, there is a tidal volume calculator (using the Devine Formula) for adults, a time remaining oxygen tank calculator, a desired versus actual PaCO2 calculator, an estimated shunt calculator and an oxygen index calculator. There is also a way to provide feedback directly to the development team if there are other calculators you would like included or if you have an idea for another app you would like to see.