Hive helps to understand performative consequences of architectural design decisions on energy efficiency, comfort, cost and emissions, without needing to bother with the many technicalities and details that come with fully fledged simulation programs. The focus lies on solar and sunpath analysis, monthly energy demand assessment for cooling, heating and electricity, as well as an integrated consideration of renewable energy system technologies, particularly building integrated Photovoltaic (BIPV). The purpose of Hive is to be accessible, easily comprehensible and fast, such that it does not hinder the creative design process but rather supports it. Therefore, most of the physics core is hidden from the user (but accessible).