I believe https://www.appointmentreminder.org/ https://www.appointmentreminder.org/ is a good example, correct me if I am wrong. I have no affiliation as it i

I believe https://www.appointmentreminder.org/ https://www.appointmentreminder.org/ is a good example, correct me if I am wrong. I have no affiliation as it is patio11's. Maybe others have some more good examples. I am sure there are a lot of examples, but that is one that sticks out immediately.