You have to be connected to the internet when using the WASHCost calculator. However the reports which you generate with the WASHCost calculator of the costs of planned or installed water and sanitation projects can be stored on your computer. These reports can also be shared with others.
For an example for a report which you can generate see: http://washcost.ircwash.org/en/report/5331a8da0bc82909db000009
This thread is public, all members of KnowledgePoint can read this page.