Large purchases make my budget negative, how can I avoid it?

In this case we recommend you to use Big Spending and distribute the expense over a period of time.  That way, your budget won’t be extremely negative on few days and the app is useful.  A good example is gasoline.  If you had to pay 100 Euro for gas, but the gas lasts a week, then you should use Big Spending and spread the expense over 7 days.