What happens to your progress
There is one boundary and it runs at the account, not at the Package. Everything you do while signed in stays - including when you have not paid a penny.
From when progress counts
From the creation of the account. Answers given before registering are not stored anywhere and cannot be recovered - so if you plan to study for a longer stretch, it is worth creating an account at the start rather than after a week.
Moving to the Package
Answer history from the free period is not reset. The repetition schedule that comes with the Package builds on what you have already done - questions you mastered earlier do not go back to the start of the queue.
After the Package expires
Progress stays on the account. You go back to the free limits, but statistics and answer history are in place - including the list of questions you got wrong.
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