Soundiiz paid offers are based on a subscription system.
That means you are able to subscribe to the monthly billing (you will pay per month) or yearly billing (you will pay one time per year for the whole year) and then cancel your subscription at any time in your user settings.
However if you only need Soundiiz to do a one time transfer to a music service, you can take the monthly billing and do the convert. Once over and having check all your datas are in the destination service, cancel your subscription.
Get more informations about the price on our Pricing page & offers.