An app for engineers to carry out hydro calculation of pipe and channel flow, pipe bend forces, radial gate forces, hydraulic jump, and peak runoff due to rainfall. For pipe flow there are available functions that comprise pipe with pump, and pipe with turbine. The cases involved include slope down pipes, and slope up pipes. Pipe entrance include from top and from bottom reservoir. The app does also have other capabilities such for calculating pipe bend forces, radial gate forces, hydraulic jump, and peak runoff due to rainfall.