Download Europe's no 1 Estimating Solution for 14 days! You can view the general interface of the software but some limitation occur like exporting and importing your database, Primavera P6 integration, Online Database subscription, enterprise compatibility, limitation on coding systems etc.
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Download On-Screen Takeoff® Trial version directly from Nomitech site and see how easy quantity surveying may become. This version of OST does not include integration with CostOS.
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CostOS™ Estimating Trial version 
On-Screen Takeoff® for Quantity Surveying Trial version 