Developed specifically for specialty contractors with field employees (plumbers, electricians, HVAC), Klox is an operations management system that, using smartphone and cloud technology, is delivered as an affordable, hosted subscription service. With the plethora of construction software products on the market, it is not always easy to keep tabs on all of the “new and improved” options on the market. did, however, recently come across one worth mentioning. The name of the product (and company) is Klox. What is Klox? Project management. Purchasing and receiving. Inventory management.