SIGN is a utility token that will be used either to send and receive payments or used on various functionalities within our future App, such as certification of documents, multi-signature of documents, etc. Users will have to use SIGN to pay for the transactions and to use the App functionalities.
Our 100% custom wallet is currently under development and is planned to be released during Q1, 2019.
Until the release, you can store your SIGN tokens safely on Waves Platform or on the Nano Ledger, that supports Waves tokens.