I use an auto refill for a prescription I get online, but somehow over the years I've accumulated 9 months worth of the prescription (one 90 bottle I just needed to start, and two unopened extra 90 day bottles in the cupboard).
My other prescriptions I pick up at the grocery store pharmacy (Wegman's) and their system sends me a text letting me know it is time to refill and asking if I want to (though they have a super confusing expected response, instead of a Y for yes, they want a "30" for yes, which since they are usually 90 day refills I worry that responding 30 will result in a 1 month supply, but it has been working okay for 90 days).