ChannelDesign is a free Android app developed by LetsConstruct, categorized under Business & Productivity. With ChannelDesign, users can interactively design Open Channel Flow for rectangular, trapezoidal and rectangular shapes. The app allows users to input width and slope both graphically or textually, and includes predefined shapes such as triangle, rectangle, and trapezoid.

One of the best features of ChannelDesign is that it graphs your channel to scale and outputs your normal and critical water depths. The app also includes US units, making it easy for users to work with. Additionally, there is a Share option that allows users to share their designs with others, and a Feedback button for users to provide their thoughts and suggestions.

Overall, ChannelDesign is a useful app for those in the business and productivity field who need to design Open Channel Flow. Its interactive design and graphing capabilities make it a great tool for those working with rectangular, trapezoidal, and rectangular shapes.