Convert prices in the country you're currently in to your local currency. The currency to convert from is automatically chosen based on which country you are currently in—without needing a Wi-Fi or data connection (which you often don't have when traveling). Your home currency is based on your Phone's region setting. If you are in your home country, you can manually choose a currency to convert from which is great when you're planning a holiday.
(Exchange rates are provided for informational purposes only, and do not constitute financial advice of any kind.)
Performance improvements.