Shipping & Delivery ‑ ShipZip

Great app and brilliant customer service. We needed to charge one shipping rate when we had multi-origin items in one basket (items from both warehouse and stores). This app does that - simply!
I asked for some help and the in app chat answered immediately and sent screenshots - accurate, speedy help - exactly what I needed.
The app has a free test mode, so we could try everything in our test store before going live.
Finally, we asked for a change to meet an unusual requirement and that is now live for us.
I recommend both this app (it's incredibly flexible) and the developer.