Tapper Tea sells coffee two ways. There is the ordinary shop, where you buy a bag and it is posted to you. And there is Tapper Cafe, which is closer to ordering food: you buy from a roaster near you and it comes the same day.
The difference matters mostly because it changes what you can buy and how fresh it is when it arrives.
Where you are decides what you see
Tapper Cafe shows you the roasters who can actually deliver to your address. Not everyone on the platform will appear, and that is deliberate — a roaster two states away can post you a bag, but they cannot get it to you this afternoon.
So the first thing the cafe does is work out where you are, and the list you see is the roasters who serve that area and currently have something priced and available.
Choosing a coffee, and a grind
When you pick a coffee you are also asked how you want it ground. This is not a formality. The roaster grinds to order, which is the single largest thing anyone can do for the quality of what ends up in your cup — ground coffee goes noticeably flat within a day, and whole beans keep for weeks.
You are choosing a brewing method as much as a grind size. Pick the way you actually make coffee at home and the grind follows from it. If you have a grinder, choose whole beans and grind each morning.
Once you have chosen, the site shows you the recipe for that specific coffee at that specific grind — the dose, the water temperature, the time — derived from what the roaster told us about that batch. It is not a generic table. A recipe for a light Ethiopian in a Chemex should not be the same as one for a dark Brazilian in a moka pot, and it is not.
What happens after you order
The order goes to that roaster. They grind it, pack it and hand it to a driver, and you can follow it on a tracking page from the link in your confirmation.
Because the roaster only grinds once you have ordered, there is a real gap between placing the order and the coffee leaving — that gap is the whole reason it is worth doing.
Ordinary delivery is still there
Not everything needs to arrive today. If your roaster is not local, or you are buying several bags, or you simply do not need it this afternoon, the normal shop posts it in the usual way.
Same roasters, same coffee. The difference is the speed and the grinding-to-order.
More detail
The customer guide walks through ordering, delivery areas and tracking in full. If you want to understand what you are choosing between before you order, the brewing guides cover every method the grind menu offers, and the roaster directory shows who is currently selling.