This is the easiest, and quickest way to subscribe on an Apple device:
Video (skip to 5:30-8:30) -simple and easiest way for Apple users
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Apple users! Best recommended option. Subscribe using .ics (ical) format on an IoS device (Apple). #1 You will need to email this link to yourself. #2 Open the email with your IPHONE and click/press the link. #3 Click the Subscribe button. #4 Click Done button.