Not quite. A few options exist to generate a seed and addresses to receive ScPrimecoin offline. To send from these addresses, you’ll need to enter the seed on a ScPrime client that is online and has downloaded the full ScPrime blockchain. Cold storage wallet is a tool for creating offline receiving addresses. It’s not an “official” ScPrime tool, but it’s written by one of the Sia developers. For pre-built Windows, Mac, and Linux packages, see the releases tab on the Github repo.