Inbox is what arrives.

This is how you tell it where to look.

Paste a link.

A feed if you have one, or just the address of the site.

It goes and finds the feed itself.

A site can publish more than one, so pick the one you meant.

File it while you are here, so Inbox stays sorted as it grows.

What kind of source it is, it works out for itself, and keeps working out, item by item.

How often to check is yours.

Every fifteen minutes, once a day, or only when you ask.

Subscribe, and the source is yours.

One link, and Inbox knows where to look from now on.