Grosh crowd sources the location of stores, meaning it learns their location from where people mark groceries as bought. Grosh comes with a predefined list of the national store chains of your country, but you can also add your own store names.
Grosh will start prompting users for the stores name for a location when many people start shopping there. Once a store name is assigned to that location, the store name will start to appear in the title of the app when you are at the store.
If you are in a store that you previously have set the name for, and the app does not detect it, this is likely to be due to your phone GPS being inaccurate. Thus Grosh believes you are not in the shop, but try restarting the app before marking groceries as purchased – this will trigger activation of the GPS again (to save energy, Grosh does not active the GPS when starting the app if you have started purchasing items).

To mark items as bought? When you are in the store, just swipe right on the current grocery list to mark items as bought.
Alternatively, open the item and tap the Bought button on the item details page.

The app “auto cleans” bought items on the list. Just mark stuff as bought, don’t delete items.
It shows the last bought item in order to facilitate undo – just swipe item again to undo the purchase.
The undo item is hidden some minutes after it was bought.
Once you buy another item, that one becomes the “undo item” – but you can still see all bought items on the history tab of the shopping list.
The next time you go shopping, no “bought” markings will be left in the app – and you start with a fresh list of things to buy.

The reason Grosh removes bought items is to make to declutter the display of the current list. It makes the list shorter and shorter as you work your way down through the list.

PS. If you added an item to the list by mistake and you are not going to buy it, swipe left in stead and tap the “Delete” button that appears.

Just select the orange grocery list screen, tap the text field at the top and start typing the name of the grocery. This will bring a short list of matches just below the text field – tap one of them or continue typing. If the system does not know the name of the grocery item, you will have to type in the entire name and then hit ENTER.

When you are in the store, it is nice to know if your partner added something to the shopping list after you left home. As you start putting items in the cart, just swipe them on the shopping list. When you do this, the app will automatically sync with our servers, and any new items added by your partner will appear on the list. You can also use the well known pull-to-refresh gesture, i.e. pull the grocery list downwards while you are the top to make the app connect to our servers again and refresh the list.

If you came into a store with bad network coverage, you will be pleased with our offline mode. It means you can use the app and swipe purchases as if you were online. When you get back online, the app will sync the list and transfer purchases to our servers and other devices. You can try it by putting your phone in flight mode. You know that you are offline mode by trying pull-to-refresh which will report if sync was successful.

If you know you’re going into a radio-dead area, it’s a good idea to open up the app first and ensure the proper list is selected and it’s automatically synced with our servers and up to date.