This feature is now a part of Practo Ray Pro plan.
To know the daily and monthly consumption of an item, on the menu bar click on reports and Select Report Category as ‘Inventory’
On the right, select the category “Daily Stock Consumption Item Wise”, then you select the “Item Name” from the drop down on the left, and you’ll get the daily report
Likewise you can select the the category “Monthly Stock Consumption Item Wise” for a monthly report