Kurs Walut is a free Android application that allows users to track current exchange rates. The app is relatively small in size and takes up little space in the phone's memory or memory card. With the app's widget, users can follow their desired exchange rate on their phone's home screen.

One of the main advantages of Kurs Walut is its widget feature. Additionally, the app provides buying, selling, and average rates for euro, dollar, franc, pound, and yen. The app also offers up-to-date charts for all of the mentioned rates. There is also a calculator feature that allows for easy currency conversion, and the rates are updated according to the current exchange rate. Lastly, Kurs Walut provides charts to help users visualize the exchange rate trends.

Overall, Kurs Walut is a helpful app for those who need to keep track of exchange rates. However, it is worth noting that the app is only available in American English and may not be suitable for non-English speakers.