You go out on a trip with friends, and someone has to manage the kitty. That person gets bogged down in managing kitty cash as well his personal expenses. And finally is always accountable to someone who feels that the expenses were not managed properly.
All that is passe ....
Expense Tracker is an App which can be used to keep expenses incurred by multiple persons. This can be maintained using either one or a dual currency. You just need to enter the expenses incurred by the various members of the group. No one person needs to manage the entire kitty.
At the end of the trip, you just need to click on the 'Settlement'
button and the App will tell you the total trip cost as well as 'who' has to pay to 'whom' how much.
This App can be used for maintaining expenses for events or travel trips. It is available on Google Play Store.