pon learned a store wrong — how do I fix it?

In an open list, open „⋯“ at the top right → „Locations“ → „Manage Locations“. There you can delete, move, rename a location or adjust its radius.

If items and shopping history are already attached to the store, pon offers you „Replace“ instead of „Delete“ — so all items and the history move cleanly to a different market. You can block a spot permanently via „Don't ask here again“.

There is a faster way, right on the item: open the item details, tap „Where to buy“ and swipe the location in the list to the left — or touch and hold it. For a location you created yourself, „Delete“ appears; for a store that ships with pon, „Replace“, because preset stores cannot be removed. If items or purchases already hang on that location, pon asks for a replacement store in both cases and moves everything over cleanly.