Everything stays free. Pro removes the ceilings.
The gesture, the reading in context, saving, your library, revision on a schedule, and export to Anki. None of that is going behind a wall - not now, not later.
A free account gets 10 readings a day. Past that a card is still made, from the dictionary rather than the model, and it says so. Nothing stops mid-scene and nothing asks you to pay while a film is paused.
A free account can be signed in on two devices at once - the phone and the browser, say. Signing in on a third asks you to disconnect one of the others first; the words stay in the account either way.
This account has no daily ceiling: every reading is the full one, and the slow, careful model is there whenever you ask for it. It works the same in the browser, on the phone and on the computer, because it belongs to the account rather than to a device.
Cancelling keeps Pro until the end of the period you have paid for.