Incredible value, universal app completely redesigned for iOS7!!  Buy once ran on both iPhone and iPad.

We believe Open Flow Pro will save you time and increase your productivity. 
Quickly calculate the quantities you need. Respond quickly and with confidence when asked questions about your project in meetings. Designed by engineers, for engineers.

OpenFlow Pro is a simple intuitive application for calculating flows, velocities and other hydraulic properties of open channels, orifices, weirs, and flues. It support several open channel and weir cross-sections including circular, trapezoidal, rectangular and triangular sections. Several flume calculators are also included. Calculators included extended results in addition to the primary variable that you solve for. Now includes a reference section with constants and coefficients.

FEATURES:
1. Provides results in both ENGLISH and METRIC UNITS!
2. Includes Open Channel calculator
3. Includes an ORIFICE calculator
4. Includes a WEIR calculator
5. Includes a FLUME calculator
6. Comprehensive look up table of over 70 manning's n-values for various materials in various conditions, and orifice coefficients
7. Shows formatted equations that are used in most of the calculations