There are some applets currently in development that may assist you as well as the native Vivokey app function that us Spark owners are currently using however if you are talking about something like car access or building access that uses the Vivokey platform specifically, you will need to roll your own at this time. I believe that there is a project or two on the forum that went this route for the Spark which also uses the Vivokey platform.
Outside of that you can register it in any currently existing system that uses the same frequency. Spark v1 is iso15693, Spark v2 is iso14443 Desfire (V1?) and not sure about the Vivokey although I believe it will also be iso14443. This option isn’t Vivokey specific though…