What you are buying
In Learn → Store you can buy materials or get free ones. Eiken materials are not speaking only. Listening and vocabulary are there too. What is for sale is whatever the Store is showing.
After you buy
They sit in My materials on the same page, split into vocabulary, listening, and speaking items. Practice opens the matching block on the Practice page. If you have none yet, those three blocks stay empty. Free materials you have not claimed have a daily practice limit; once claimed, there is no limit.
Separate from add-on minutes
Practice time (subscription and add-on packs) is Me → Purchase center. The Store does not replace add-on minutes, and Purchase center does not sell these listening or vocabulary materials.