Store Hours by HourDB is a store hours look up service for the US. It currently indexes around 320,000+ locations, which are easily searchable. So, ever wonder when the restaurant chain by your house closes? Finally you can find out. Or, if you want to find all the open locations around you at 3AM -- you can do it.
Some locations don't have hours, in which you can help by adding them to it via this app. Locations and businesses can be added directly on hourdb.com.