WithholdingCalc is a comprehensive paycheck estimator designed for iPhone users, focusing on tax withholding calculations. This ad-free application allows users to input various parameters such as gross pay, pre-tax deductions, filing status, and state to estimate the amount of taxes withheld from their paycheck. It provides insights into budgeting by showing how much money will be taken by the government versus what remains for personal use.

For those seeking more detailed calculations, WithholdingCalc offers an advanced view where users can input additional withholding amounts and customize their state-specific tax details. The app utilizes the 2018 tax rates for federal and state taxes applicable to 41 states, ensuring reliable estimates. Future updates will enhance its functionality, including hourly rate computations and local tax considerations.