DayCalc Pro is an easy-to-use and beautifully packaged calculator and unit converter available for iPhone, iPad, and Apple Watch. It offers a range of features including a live voice calculator, the ability to add notes to the history of your calculations, and the option to choose between a basic or scientific calculator with over 30 scientific operations.

With DayCalc Pro, you can use both calculators in portrait or landscape mode, and there is also split screen support for iPad users. The height of the history list automatically adjusts to display the full calculation process, and you can lock the calculation history to prevent it from being deleted or modified.

The app also includes a unit converter with over 600 units in 20 categories. You can even add your own unit data to create a custom unit converter that meets your specific requirements. DayCalc Pro supports over 150 currencies with automatic exchange rate updates.

In addition to its functionality, DayCalc Pro offers a range of customization options. There are over 50 beautiful themes to choose from, and you can view and edit a history of your calculations on the History Panel. The app also includes multiple button sounds, and the option to mute the button sound.

Overall, DayCalc Pro is a comprehensive calculator and unit converter that offers a range of features and customization options. It is available for download now and provides a classic calculator experience.