Yes, you can add as many product placements as you want, and you can even duplicate items on your shelves in two ways in the mobile app.
First way of duplicating an item #
Open the shelf on which you wish to duplicate your item, slide the product to the left, and you will expose the duplicate button. Tab on the button and answer ‘Yes’ to the popup ‘Are you sure you want to duplicate this item?’.
Second way of duplicating an item #
Open the shelf on which you wish to duplicate, and tap on ‘Edit’ on the upper right corner. Check the item you wish to duplicate, and then tap on ‘Duplicate’ in the lower left corner.