US Dollar South African Rand is a free Android application developed by Webtoweb. It falls under the category of Business & Productivity, specifically Finance. This application provides a convenient way to convert amounts between US Dollar (USD) and South African Rand (ZAR), as well as access historical exchange rate data.

The currency converter feature allows users to simply enter the amount they want to convert, and the result is instantly displayed. Users have the option to convert from USD to ZAR or from ZAR to USD, making it flexible for different currency exchange needs.

One of the standout features of this application is the ability to view a chart of the historical exchange rates between the US Dollar and South African Rand. Users can see rate variations from the past week and months, including the highest and lowest rates. Additionally, the chart can be customized to display historical data for the last month, trimester, semester, or year.

It's worth noting that internet connectivity is required to fetch the latest exchange rates and view the chart. This application is particularly useful for travelers, businesses, and financial professionals who deal with currency exchange between the United States and South Africa.