ATO Tax Calculator, developed by Bright Purple Frog, is a free Android application that provides a simple solution for calculating basic PAYG assumptions based on the current Australian Tax Office tax tables. Whether you have been offered a new job or need to calculate your yearly gross income, this app can help you make quick and easy calculations.

The app has a user-friendly interface that allows you to type values into any field, and it will automatically calculate the others. It doesn't take into account the 100 or so questions a tax advisor would ask, but it provides a basic assumption that can be used as a starting point for your tax calculations. With ATO Tax Calculator, you can make informed decisions about your finances without having to spend hours on complicated calculations.

Overall, ATO Tax Calculator is a useful tool for anyone who needs to calculate their basic PAYG assumptions quickly and easily. It is free, easy to use, and provides accurate results based on the current Australian Tax Office tax tables.