At the moment, the subscription includes practice and submission of writing and speaking parts of the tests of your choice. Depending on your test, you get a certain number of practice questions. For example, if you choose IELTS General, you get:
10 Writing modules which have 2 tasks in each, so total is 20 tasks that you can submit for evaluation.
10 Speaking modules which have 3 tasks in each, so total is 30 tasks that you can submit for evaluation.