"DB" == Dave Butler writes:

DB If you like, you can jump back and forth between the two
DB levels of subscription on a month-to-month basis.

Can you turn the subscription on and off?

For instance, most of the year I fly locally in Northern California,
within a few hundred miles of home base, and the weather is very
predictable: sun inland, fog on the coast in the morning. But once a
year I like to fly an overnight cross-country and then the WX would be
very handy.