# RPN Big Float Calculator > High-precision calculator for advanced mathematical functions and number systems. (iPhone/iPad app by Stephan Jancar.) - Source: https://appshunter.io/ios/app/rpn-big-float-calculator/id1312613680 (this page in markdown: same URL + `.md`) - Developer: [Stephan Jancar](https://appshunter.io/developer/1107422127) - Category: Education, Productivity - Price: Free - Rating: 5.00/5 from 1 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 14.1 · 14 MB - Languages: American English - Released: 2021-01-18 - Data updated: 2026-06-01 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/rpn-big-float-calculator/id1312613680/reviews.md ## What is RPN Big Float Calculator? Perhaps the most accurate calculator on the iPhone. Precision from 16-bit up to 100.000. Fast Calculation in RPN-Mode or direct formula input. Lots of functions up to elliptic integrals, theta-functions, gamma and log gamma. Built in constants for gamma, pi, Feigenbaum. Calculation mode for complex numbers, quaternions, integers and p-adic numbers. Nerdy functions with Klingon user-Interface. ## Key features - High precision up to 100,000 digits - RPN and direct formula input modes - Complex number and quaternion calculations - Elliptic integrals and theta-functions - Built-in mathematical constants - P-adic number calculations ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/rpn-big-float-calculator/id1312613680/reviews.md ### 4/5 — large room for improvement *2023-03-18, version 6.0* I have bought many calculators in AppStore. This is the only one where you can have calculation results with way more than 12 decimals. This calculator has so much potential, as far as I can see! It is such a pity that it has not been designed with any other user in mind, apart from the developer himself! There are two (usually implicit) goals in writing a manual for a sofware one has developed. One, let's call it «the generous goal», is to help as many potential users feel at home with most of the application functionality. The other goal, let's call it «self-afirming one», is for the developer, to bask in the limelight of his professionalism. Such a manual is not written for potential users, but for fellow developers, in some sort of professional competition among developers. It is similar to radio short wave afficionados, train spotters, and other hobbyists. The more obscure the hobby is, the higher the compulsion in bragging with one's own expertise. Sadly, most German-speaking developers are of the second kind, so their manuals are useless (at least for potential users). What a pity!! To preempt misunderstandings: I have studied mathematics myself in Heidelberg, so I might have some idea about maths. What I criticise here is the developer's reluctance of making this application easy to use. ### 3/5 — Precision rules! *2022-05-24, version 5.0* This calculator uses RPN logic, making it very fast and efficient. It works without intrusion or interruption and is primarily focussed upon delivering very high precision. However, the bombardment of bright green, square numerals from an 'LED'-styled font out-shines the useful, extra functionality of the keypad. The result is an assault upon one's senses; and prolonged use can be tiring, even headache inducing! That said, I very much respect the lack of advertising - which is always worse than the above. Commendable. ## Frequently asked questions about RPN Big Float Calculator ### What is the precision of RPN Big Float Calculator? RPN Big Float Calculator offers exceptional precision, ranging from 16-bit up to 100,000 digits. This allows for highly accurate calculations in complex mathematical scenarios. ### Does RPN Big Float Calculator support RPN mode? Yes, RPN Big Float Calculator supports RPN (Reverse Polish Notation) mode for fast calculation, alongside direct formula input. This offers flexibility for users accustomed to different input methods. ### What advanced functions are available in RPN Big Float Calculator? The calculator includes numerous advanced functions such as elliptic integrals, theta-functions, gamma, and log gamma functions. It also features built-in constants like pi and Feigenbaum. ### Can RPN Big Float Calculator handle complex number calculations? Absolutely. RPN Big Float Calculator supports calculation modes for complex numbers, quaternions, integers, and p-adic numbers, making it suitable for advanced mathematical research. ### What is the age rating for RPN Big Float Calculator? RPN Big Float Calculator has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger learners and adults. ### On which devices can I use RPN Big Float Calculator? RPN Big Float Calculator is available on Mac, iPhone, iPad, and iPod. This broad compatibility ensures you can use it across multiple Apple devices. ### How often is RPN Big Float Calculator updated? The latest version of RPN Big Float Calculator is 6.0, last updated on September 16, 2022. While specific update frequency isn't detailed, this indicates ongoing development. ### Does RPN Big Float Calculator have ads? No, RPN Big Float Calculator does not contain advertisements. As a free application, it provides an uninterrupted user experience without any ad interruptions. ## Version history (last 5 releases) ### 6.0 — 2022-09-16 Representation of numbers in different number systems (Egyptian, Roman, Tibetan, ...) ### 5.0 — 2021-09-27 Visual Feedback in Latex-Format ### 4.0 — 2021-09-17 Calculation Mode for p-adic numbers ### 3.0 — 2021-09-10 Support for interval arithmetic and quaternions. ### 2.0 — 2021-02-21 Improved User-Interface ## Apps similar to RPN Big Float Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [RPN Memory Calculator](https://appshunter.io/ios/app/rpn-memory-calculator/id1398878075) | — | Free | Education | | [Taculator 84 Graphing Calc](https://appshunter.io/ios/app/taculator-84-graphing-calc/id1457737367) | 4.5 (7,509) | Free | Education | | [Symbolab Graphing Calculator](https://appshunter.io/ios/app/symbolab-graphing-calculator/id1435182798) | 4.0 (213) | Free | Education | | [GeoGebra Calculator Suite](https://appshunter.io/ios/app/geogebra-calculator-suite/id1504416652) | 4.3 (51) | Free | Education | | [NumWorks Graphing Calculator](https://appshunter.io/ios/app/numworks-graphing-calculator/id1456585807) | 4.4 (94) | Free | Education | | [HP Prime Lite](https://appshunter.io/ios/app/hp-prime-lite/id1208226883) | 3.5 (40) | Free | Education | ## More apps by Stephan Jancar - [RPN Big Integer Calculator](https://appshunter.io/ios/app/rpn-big-integer-calculator/id1300713250) All apps by Stephan Jancar: https://appshunter.io/developer/1107422127 ## Related topics [9,116.40 1,826.84](https://appshunter.io/ios/topics/9-116-40-1-826-84) · [+666666666666666688888888888888888](https://appshunter.io/ios/topics/666666666666666688888888888888888) --- *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 2026-06-01.*