Scan your receipts and keep a running total of your Vitality cashback, every month.
Drag on the photo to box just the receipt, and use the slider so the lines are level.
Receipt V total
Enter each store's cashback % and Rand limit at the start of every month.
The key is saved in your own account record, which only you can read. Receipt photos are sent to Google for reading. Leave the key empty to use the less accurate built-in reader.