When I cancel the subscription, can I still use the app?

If you start a trial and then immediately cancel, you can keep using the trial until it expires. It won't charge your credit card at the end of the trial period, but you keep full access until the expiration date of the trial.

Once your trial or subscription expires after you have canceled, your notes will be in read-only modus. You can open and read all your notes, but you will not be able to edit or create new notes.