An app for engineers to design steel connections encompassing fixed, pinned, base plate, and cladding support connections. The fixed connection comprises two types, one without haunch and another with haunch. And this fixed connection is for universal beam to universal column flange connection. The pinned connection can be designed either with one shear plate or two shear plate. A maximum of two bolt columns can be included. The base plate connections is applicable for I, C, T, Circular Hollow Sections, and Rectangular Hollow Sections. The cladding support connections involves designing the connection cleats and bolts for both purlin and flange brace connections.