The All In One Calculator is the most complete calculator in the App Store. Ideal for every day use or more complex needs. Still free and without ads. It's an easy to use and modern calculator with a unique combination of features which include:
• Runs on all iPod, iPhone and iPad devices
• Multitasking
• Full support for drag and drop
• Classic and Dark color theme
• Various button styles
• Quick Guide for easy onboarding
• Navigation bar for easy access to many features
• All calculator functions available in portrait mode
• Unit Converter (includes currency)
• History (paper tape) feature allows you to see and use previous calculations
• Multiline expression in portrait and landscape
• Works with decimal numbers and fractions
• Precision for decimal results can be adjusted
• Grouping of operations with parenthesis
• Supports undo and redo
• Views for Infix, RPN and Programmer
• Support for hexadecimal, octal and binary with many of bitwise operators
• Home screen icon for quick actions (3d Touch)
• Expression editing
• Accessibility features like VoiceOver
• Layout can be adjusted for right handed or left handed use
• Fraction keys can be changed to other keys in portrait mode
• Has a delete button for easy editing
• Allows you to share results; including using AirDrop
• Takes advantage of the larger display in iPad
• Info button with detailed description of all features
• Support common memory functions
• Viewing of contents in memory
• Simple layout in portrait and a more advanced layout in landscape
• Fractions can be converted to different forms; including decimal
• Large buttons with ergonomic layout
• App hints during normal use
• Statistic functions

You no longer need a fractions calculator and decimal calculator; nor a unit converter. Future upgrades will add more features so you don’t have to switch back and forth among other apps.


What’s New

Version 7.9.7

Thank you for using our app. It's regularly improved and modernized to better serve you.

Recent changes include:
• Corrected layout problems with Advanced Functions (sometimes would show one row instead of two in iOS 10.x or earlier, or button rounding would be incorrect).
• Corrected problem with the disabled color of digit buttons when switching numeric base in programmer mode. Sometimes disabled buttons wouldn't show disabled.
• The m+ button sometimes did not work in Programmer mode.
• Other improvements and corrections.

Ratings and Reviews

4.7 out of 5
39 Ratings
39 Ratings
Hot-mama-from-Cartagena ,


Nice job! I love how I can change the layout of numerical keypad.
And the unit conversion feature.

Wncranger ,

Deserves a look!

This calculator app deserves a closer look. It is packed with features and is free!

Joe 401 ,

X^Y or Y^X

Great App. Thanks for your quick response.

Developer Response ,

Hi Joe,
you're absolutely correct! I made the mistake of using X^Y in RPN when it should be Y^X. A v7.4.2 will be out as soon as Apple gets back from their Holiday break. Thanks for taking the time to provide a review and to point out this issue.


Ramon Rivas
115.4 MB
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Spanish
Age Rating
Rated 4+
© Ramon Rivas 2013-2018


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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