# All in One Calculator — Many calculators in one app > A feature-rich, ad-free calculator with multiple modes and unit conversion. (iPhone/iPad app by Ramon Rivas.) - Source: https://appshunter.io/ios/app/all-in-one-calculator/id664569132 (this page in markdown: same URL + `.md`) - Developer: [Ramon Rivas](https://appshunter.io/developer/664569135) - Category: Productivity, Utilities - Price: Free - Rating: 4.66/5 from 183 App Store ratings · 32 written reviews indexed - Age rating: 4+ - Requires: iOS 17.6 · 126 MB - Languages: English, Spanish - Released: 2013-07-15 - Data updated: 2026-07-22 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/all-in-one-calculator/id664569132/reviews.md ## What is All in One Calculator? All in One (aio) Calculator is the most complete calculator in the App Store. Ideal for every day use or more complex needs. The app is free and without ads. It's an easy to use and modern calculator with a unique combination of features. General features • Available on all iPad and iPhone • Sidebar and Tab bar for easier navigation and sharing of data • Drag and Drop from Sidebar to the edge of the screen to create new window • Context menu option to create new window from Sidebar entries • Pinch gesture on Sidebar entries to create new window • Drag a calculator button to the edge of the screen to create a new calculator window • Widget showing recent results • Scribble • Stage Manager • Multiple Windows • Context Menus • Multitasking • Quick Notes • Capture text • Keyboard shortcuts • Pointer interaction • Two finger swipe for quick editing in Unit Converter and History • Slider for precision control • 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 available for all results • Home screen icon for quick actions (3d Touch) • Delete button for easy editing • Undo and redo • Adjustable precision for decimal results • Spotlight Search • App Intents for use with Shortcuts Calculator Views • Views for Standard (Infix), RPN and Programmer • Context menu provides easy access to many features • Statistic 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 • Simple layout in portrait and a more advanced layout in landscape • All calculator functions available in portrait (don't need to rotate the device) • Various button styles • Change location of number pad for better accessibility Unit Converter • Close to 500 units in 38 measurements; including Currency • Share results with others or paste back into the calculator for further use • Two finger swipe for quick editing • Context menu provides easy access to many features History • History (paper tape) feature allows you to see and use previous calculations • Annotate history entries to remember what they were • Search in history • Share results with others or paste back into the calculator for further use • Two finger swipe for quick editing • Context menu provides access to many features Info feature • Detailed description of the app available in all features • 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 • Context menu provides easy access to many features Programmer • Support for hexadecimal, octal and binary number systems • Manipulate individual bits • Many bitwise operators • Shows equivalents ASCII and Unicode characters • Context menus provides easy access to many features Fractions • Fractions can be converted to different forms; including decimal • Fraction keys can be changed to other keys in portrait mode • Works with decimal numbers and fractions You no longer need a 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! ## Key features - 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 ## Recent user reviews (10 of 32) All indexed reviews: https://appshunter.io/ios/app/all-in-one-calculator/id664569132/reviews.md ### 5/5 — Advanced Features *2025-10-05, version 12.1.3* 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! ### 4/5 — really great app *2024-07-28, version 11.3.4* 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 ### 5/5 — Excellent Free Calculator *2024-04-09* This is an excellent Free Calculator, also free of Ads. ### 5/5 — Super functional *2024-02-10, version 11.3.1* 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! ### 5/5 — Fantastic!!! *2023-01-13, version 11.1.2* 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! ### 5/5 — Exactly what I have been looking for! *2022-08-16* I have been searching for a programming calculator for a while and have gone through quite a few apps before finding this one. It does everything I have been looking for that other apps lack. Being able to look back on calculator history as well as comment on operations is a feature I didn’t know I needed, but has come in use multiple times. The unit conversion has more units than I have seen in any other app and shows all units converted rather than having to pick a 1:1, which is very handy for quick comparisons. The developers are also very helpful and quick to respond. ### 1/5 — Constantly nags to login to iPhone account *2022-04-08* I'd give this at least 4 stats if it wasn't for all the nagging about logging in to my iPhone account. Every time I start up the app it nags. I have no intention of ever logging in to satisfy this app as the os no legit reason to needed such a thing for a calculator. **Developer response:** OK. I looked into this and the app does indeed prompt you to sign into iCloud whenever the app is re-started. Apps usually go into background and are not re-started but, of course, they can be re-started at will. So, in most cases, the instances of the prompt should be very few (and not at all if you are signed into iCloud). Nevertheless, I agree that it's better to not repeat the prompt. A new version is now available (10.6.4) that will only prompt once. I appreciate that you took the time to report this and hope you give the app another try. ### 5/5 — Wow! *2022-01-20* Super calculator full of nice features! ### 5/5 — An amazing app! *2021-12-23* It combines all the different calculators which makes it really useful. ### 5/5 — Programmer Analyst *2021-11-15, version 10.1.4* One of the greatest calculators so far. Everything you wanted to have in a calculator. ## Frequently asked questions about All in One Calculator ### 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. ## Version history (last 5 releases) ### 13.0.4 — 2026-04-12 Thank you for using our app. It's regularly improved and modernized to better serve you. Recent changes include: • General improvements and corrections ### 13.0.3 — 2026-03-04 Thank you for using our app. It's regularly improved and modernized to better serve you. Recent changes include: • Updated for iOS and iPadOS 26, and new iPhone 17 (all models) • General improvements and corrections ### 13.0.2 — 2025-12-19 Thank you for using our app. It's regularly improved and modernized to better serve you. Recent changes include: • Updated for iOS and iPadOS 26, and new iPhone 17 (all models) • General improvements and corrections ### 13.0.1 — 2025-12-16 Thank you for using our app. It's regularly improved and modernized to better serve you. Recent changes include: • Updated for iOS and iPadOS 26, and new iPhone 17 (all models) • General improvements and corrections ### 13.0.0 — 2025-12-12 Thank you for using our app. It's regularly improved and modernized to better serve you. Recent changes include: • Updated for iOS and iPadOS 26, and new iPhone 17 (all models) • General improvements and corrections ## Apps similar to All in One Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [ZappID](https://appshunter.io/ios/app/zappid/id1455029820) | — | Free | Productivity | | [Thetis Tools](https://appshunter.io/ios/app/thetis-tools/id1460268980) | — | Free | Productivity | | [Jumpstash](https://appshunter.io/ios/app/jumpstash/id1465670860) | 4.2 (5) | Free | Productivity | | [OneTwoCount](https://appshunter.io/ios/app/onetwocount/id1454584180) | — | Free | Productivity | | [Your Ashford BC](https://appshunter.io/ios/app/your-ashford-bc/id1452979480) | — | Free | Productivity | | [SyncOnSet 5.0](https://appshunter.io/ios/app/synconset-50/id1460160860) | 1.8 (60) | Free | Productivity | ## More apps by Ramon Rivas - [Converter of Units](https://appshunter.io/ios/app/converter-of-units/id1350148498) All apps by Ramon Rivas: https://appshunter.io/developer/664569135 ## Related topics [all in one calculator](https://appshunter.io/ios/topics/all-in-one-calculator) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-22.*