You can attach files on your registered expenses and incomes. Let's suppose you purchase something, take a picture of the receipt and attach the picture to the expense you registered on Mobills.
Access the expenses or incomes screen and then, click on the 'Attachment' icon to attach a receipt or another file of your preference to your transaction.
P.S: It is important to know that it is only possible to attach receipts or other files to common transactions. This feature is not available yet on credit card expenses.
After that, click on 'Attach receipt' and select it directly from your computer files and then save the registers made.
Be aware: the process to attach receipts and files to incomes is the same to attach files and receipts on expenses.