With Release 16.1, Grants.gov will be adding an Opportunity Subscription Management feature that allows users to update their subscriptions to saved searches and funding opportunities. (Currently, once a subscription is created, there is no way to update it). This enhancement will be deployed on November 20, 2017.
Here are some of the features coming with the release:
Logged-in users will be able to subscribe to a funding opportunity – including forecast, synopsis and package – with a single click on the View Grant Opportunity page. Also, users can save searches from the Search Grants page.