The Moody Chart Calculator is a must have app for any engineering student taking fluid dynamics or any piping system designer. It allows one to quickly compute a friction factor given a Reynolds number and relative roughness. Works for both laminar and turbulent flows. Results are accurate because the app actually solves the Colebrook equation that the Moody chart is based off of. The results are able to be highlighted and copied into e-mails or documents on your device. All of this without annoying ads getting between you and getting your work done.