Calculator HD Pro Lite is a free-to-use calculator for iPhone developed by Cider Software LLC. It offers a colorful and fully customizable interface with BIG buttons and LOTS of features to make your calculations easier. The app provides a dual-line display that shows the input and result at the same time, along with a history tape that saves every calculation with a time and date stamp.

The calculator also includes memory buttons that show their value on the display, percentage, and backspace buttons, scientific functions, and multi-line input for long equations. It comes with six layouts, three portrait, and three landscape, and ten color themes to choose from. The app also provides automatic scientific formatting and the ability to label any calculation in the history tape.

Additionally, Calculator HD Pro Lite offers voice-over accessibility, iOS 9 Split View, and 3D Touch. The app supports various gestures, such as swiping down to see the history tape and tapping and holding on the result to copy it. You can also customize the app according to your preferences, such as font size, bold font, color theme, light tape background, and more.

Overall, Calculator HD Pro Lite is a great utility tool that offers a convenient and customizable way to perform calculations on your iPhone.