Worktools 101 is a web-based SAAS estimating and job costing app designed by a contractor, specifically for small business builders, landscapers, remodelers and specialty contractors.The app was designed to function in a three-state workflow. First, build a simple or complex estimate using labor, materials, equipment, and subcontractor items from the apps built in library. Next, convert the estimate to a work-in-progress and assign billings and expenses to it. Finally, mark the project complete to automatically transfer costs and billings from the Balance sheet to the Income statement.