So say you are spending a weekend together at a cottage. Mike pays for the petrol to wherever you are going, and Lisa pays for the food. Other small expenses pop up along the way, as they tend to do. After the trip is over and you're finally safe from the mosquitos Scred will work out all the complex shared expenses between participants back and forth and will tell you exactly what each person owes, and who is expecting money. All you need to do is to lie back and relax.