Traveling - especially world travel - can wreak havoc on your finances. It's easy to lose track of how much you're spending and stick to a budget when you're spending in more than one currency.
Toshl Finance Budget & Expense is a must-have money app if you travel a lot. It lets you track your day-to-day expenses in any currency and gives you the exchange rates for 160 countries updated daily.
Even if you aren't traveling, it's a great app to have. You can track income and expenses with an easy-to-use interface. You can even set up recurring item and export your database to Excel and other spreadsheet programs.
There's budgeting tools for making sure you're keeping your spending in check. It even reminds you when bills are due.
It can sync your data to the app on other gadgets and toshl.com, and you can included multiple family member budgets in the same account.
The app is free, but there's a paid subscription option that gives you multiple budgets and incomes, along with more graphs and export options.