The claims that InnovoCAD make on their website are misleading.
They suggest that their tools can be used with Viz Studio 2013 and 2015 to create apps. for MicroStation V8i. That is incorrect: you must use the C++ linker and compiler provided with Viz Studio 2005 to build apps. for MicroStation V8i.
Whatever their toolkits provide, they can't overcome some drawbacks of Viz Studio. bmake remains a valid tool for building apps. for both MicroStation V8i and MicroStation CONNECT.