All in One (aio) Calculator puts three calculators and a unit converter in one app: infix, RPN and programmer, with fractions, statistics, and close to 500 units in 38 measurements. Ideal for everyday use or more complex needs. The app is free and without ads. It's an easy-to-use, modern calculator. General features • Designed for iPhone and iPad • Sidebar and tab bar for easier navigation and sharing of data • Open a sidebar entry in its own window: drag it to the edge of the screen, pinch it apart, or use its context menu • Drag a calculator button to the edge of the screen to create a new calculator window • Widget showing recent results • Context menus throughout for quick access to many features • Scribble • Windowed apps and Stage Manager • Multitasking • Quick Notes • Capture text • Keyboard shortcuts • Mark favorites and edit the lists to show only what you use • Full support for drag and drop • Light and Dark appearance • Quick Guide for easy onboarding • Toolbar for easy access to many features • Accessibility features like VoiceOver and Voice Control • Speak any result aloud • Home Screen quick actions from the app icon • Delete button for easy editing • Undo and redo • Adjustable precision for decimal results, with a slider for quick changes • Spotlight Search • App Intents for use with Shortcuts Calculator Views • Expressions written in mathematical form • Views for Infix (standard), RPN and Programmer • Statistical functions (average, standard deviation and more) • Expression editing • Share results, including using AirDrop • Common memory functions • View contents in memory • Multiline expression in portrait and landscape • Every function is available in portrait, so there is no need to rotate the device: slide the keypad down to reveal the advanced functions • Landscape shows more keys at once • Groups of advanced functions: switch from the toolbar or by swiping the keypad, and long press the toolbar button to see each group by name • Pinch the result to adjust the precision • Various button styles • Number pad on the right or left for better accessibility Unit Converter • Close to 500 units in 38 measurements, including Currency • Share a result, or paste it back into the calculator for further use • Search measurements and units History • History (paper tape) lets you see and use previous calculations • Results from the calculator and the unit converter are saved here • Annotate history entries to remember what they were • Search in history • Share a previous result, or paste it back into the calculator • Optional iCloud sync across your devices Information • Detailed in-app help for every feature • Table of contents and search allow you to find topics of interest RPN • Shows as many rows in the stack as needed • Shows the expression that generates the result • Drag and drop among rows • Buttons to manipulate the stack Programmer • Support for hexadecimal, octal and binary number systems • Manipulate individual bits • Many bitwise operators • Shows equivalent ASCII and Unicode characters Fractions • Fractions can be converted to different forms, including decimal • Fraction keys can be changed to other keys in portrait mode You no longer need several calculators, nor a unit converter. Future updates will continue to add more features. Enjoy our app that, as always, is free and without ads!