All in One Calculator

All in One Calculator

Many calculators in one app

183 ratings
32 reviews
Free

Details

  • Released
  • Updated
  • July 15, 2013
  • April 12, 2026

Features

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About

This comprehensive calculator app offers a wide range of functionalities for everyday and complex calculations. It features multiple calculator views, a unit converter, and a detailed history log. Designed for ease of use and accessibility, it supports multitasking and various input methods.

Multiple calculator views (Standard, RPN, Programmer)
Extensive unit converter with nearly 500 units
Detailed calculation history with annotation
Multitasking and drag-and-drop support
Adjustable precision and keyboard shortcuts
Light and Dark appearance options
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What's New in All in One Calculator

13.0.4

April 12, 2026

Thank you for using our app. It's regularly improved and modernized to better serve you. Recent changes include: • General improvements and corrections

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User reviews

Advanced Features

It’s great. A Comprehensive conversion tables for many different units of measurement. Custom decimal placing limits. 3 types of calculators. Has ability to count/calculate in Binary, Hex, Octo, Deci Code. Can use logic formulas, NAND/AND ETC..

Overall - many features. From school work to mapping, electrical, the trades, currency, physics, computer data it’s got quite a bit to help convert units, and calculate values. Recommended for those who enjoy in depth learning, designing/engineering/programming/technical troubleshooting. Information beyond your typical calculator. I have emailed the app owner for an electrical circuit calculator/chart for AC/DC circuits. In hopes they can find a way to make that happen.
Get it if you’re into getting a good calculator app!
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really great app

power-one changed its ui and wanted monthly fee's after I bought premium. So luckily found this app. Wish I could pay a donation for it is very professional

Excellent Free Calculator

This is an excellent Free Calculator, also free of Ads.

Super functional

Excellent free app a ton of functionality. I got it mainly for the programmer mode and the only thing missing that I'd have liked to see is the ability to work with signed integers, with the option to select 16, 32 or 64. Many thanks to the developer!

Fantastic!!!

I’ve been wanting & looking for a calculator app for my iPad for a very long time. This is brilliant! It has all the functions you could possibly ask for & then some. It is particularly useful in class when students are doing calculator work. It is ad free so no issues about children being exposed to inappropriate content. I hope they keep it that way forever! Cannot thank the developers enough on what a fantastic app you’ve created. My only constructive feedback would be: please don’t overload it with features as it will become too overwhelming & complex to use. It is already quite scientific. Thanks!
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Developer apps

FAQ

What does the All in One Calculator app do?

This app is a comprehensive calculator designed for both everyday use and complex calculations. It includes multiple calculator views like Standard, RPN, and Programmer modes, a unit converter with a vast number of units, and a detailed history feature to review and annotate past calculations.

What are the key features of this calculator app?

Key features include support for Standard, RPN, and Programmer calculator modes, a unit converter with nearly 500 units across 38 measurements, a history log with search and annotation capabilities, and extensive multitasking features like drag-and-drop and multiple windows. It also offers adjustable precision, keyboard shortcuts, and accessibility options.

Is this calculator app free to use?

Yes, the All in One Calculator app is completely free to use and does not contain any advertisements. This allows users to access all its features without any cost or interruptions.

What devices is the All in One Calculator app compatible with?

The app is available on all iPad and iPhone devices, making it accessible to a wide range of Apple users. It is designed to take advantage of features specific to these devices, such as sidebar and tab bar navigation, and multitasking capabilities.

Who would benefit from using the All in One Calculator app?

This app is ideal for students, engineers, programmers, and anyone who frequently performs calculations or needs to convert units. Its diverse functionalities and advanced features make it suitable for both simple daily tasks and more complex scientific or technical computations.