SwipeSimple Web
When adding a new item or editing an existing item, click the drop-down menu next to "Keep track of inventory" and select Yes. Next to "Count on hand," set the current quantity of the item you would like to track.
SwipeSimple Mobile
When adding a new item or editing an existing item, toggle the switch next to "Track Inventory" and then update the quantity field above the toggle that highlights. Once you've done that, click "Create" or "Update Item" to save.