# Linear regression RPN calc > RPN scientific calculator with statistical and linear regression functions. (iPhone/iPad app by angel garcia rubio.) - Source: https://appshunter.io/ios/app/linear-regression-rpn-calc/id926072660 (this page in markdown: same URL + `.md`) - Developer: [angel garcia rubio](https://appshunter.io/developer/729430853) - Category: Utilities, Education - Price: Free - Rating: 1.50/5 from 4 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 1 MB - Languages: American English, European Spanish - Released: 2014-10-16 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/linear-regression-rpn-calc/id926072660/reviews.md ## What is Linear regression RPN calc? Linear regression RPN calculator is a scientific RPN calculator with statistical functions. It's a tribute to the legendary HP41. This calculator implements all scientific and arithmetic functions, 4 levels stack, 10 storage registers, and statisctics capabilities. Statistics features: • Manages simple series or dependent series. • Saves your series. • Loads a saved series. • Send your series by email. • Get statistical variables. • Get Linear regression coefficients using the least squares approach. • Graphical data representation. ## Key features - RPN scientific calculator - Statistical functions - Linear regression analysis - Data series management - Graphical data representation - Email data series ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/linear-regression-rpn-calc/id926072660/reviews.md ### 3/5 — Used to be the best *2020-08-07, version 1.2.1* I used this calculator app for years since I have used RPN since the introduction of the HP-35 calculator. This version is now locked in light mode when my phone is, whereas it used to look like the current dark mode. Also, we in the US use a . For the decimal point. So, I suggest you (1) allow the user to pick dark or light mode from the app settings, and not tie it to the phone’s overall dark/light setting, and (2) allow the user to specify . or , as the decimal point indicator. As far as function, this app works great as a replacement for my worn-out HP-41CV. ### 1/5 — Update ruined the app *2020-06-21, version 1.2.1* This was my go to calculator for the last several years. New version’s design is annoying, and I just don’t understand who would think having the display be a small fraction of the size of the keyboard was a good idea. ### 1/5 — Useless without instructions *2015-04-20, version 1.0* Rendered useless without instructions on how to use this calculator, specifically how to enter data for statistics and regression analysis. No manual in app, and link to author's web site is useless, too. Could not do anything with it ## Frequently asked questions about Linear regression RPN calc ### What is Linear regression RPN calc? Linear regression RPN calc is a scientific calculator that uses Reverse Polish Notation (RPN) and includes statistical functions like linear regression. It is designed as a tribute to the HP41 calculator. ### What statistical features does Linear regression RPN calc offer? It manages simple and dependent series, allows saving and loading series, sending them via email, retrieving statistical variables, and calculating linear regression coefficients using the least squares method. It also provides graphical data representation. ### Is Linear regression RPN calc free to use? Yes, Linear regression RPN calc is available for free. It does not have any associated costs for download or use. ### What devices is Linear regression RPN calc compatible with? Linear regression RPN calc is compatible with iPhone, iPad, and iPod devices. It is designed for iOS operating systems. ### How often is Linear regression RPN calc updated? The latest version of Linear regression RPN calc is 1.2.1, which was last updated on June 18, 2020. The app has not received updates since then. ### What is the user rating for Linear regression RPN calc? Linear regression RPN calc has a rating of 1.5 stars based on 4 user ratings. This indicates a generally low user satisfaction. ### What is the age rating for Linear regression RPN calc? Linear regression RPN calc has an age rating of 4+. This means it is suitable for users aged 4 and above. ### Does Linear regression RPN calc have ads? The provided data does not specify whether Linear regression RPN calc contains advertisements. However, since it is free and does not mention in-app purchases, it may be ad-supported. ## Version history (last 3 releases) ### 1.2.1 — 2020-06-18 IOS 13 features.  Dark mode.  Export data to Files App.  Fix some bugs. ### 1.0.1 — 2015-10-27 fix some bug ### 1.0 — 2014-10-16 No release notes. ## Apps similar to Linear regression RPN calc | App | Rating | Price | Category | | --- | --- | --- | --- | | [HP41CV](https://appshunter.io/ios/app/hp41cv/id1214637000) | 2.7 (21) | Free | Utilities | | [Calculator Of Statistics](https://appshunter.io/ios/app/calculator-of-statistics/id1298432289) | 3.0 (2) | Free | Utilities | | [ThetaCalc](https://appshunter.io/ios/app/thetacalc/id1521614636) | 4.3 (4) | Free | Utilities | | [Calculator Mini](https://appshunter.io/ios/app/calculator-mini/id937255022) | 2.5 (4) | Free | Utilities | | [Calctan](https://appshunter.io/ios/app/calctan/id1445480535) | 4.5 (58) | Free | Utilities | | [Halcyon Calc Lite](https://appshunter.io/ios/app/halcyon-calc-lite/id408004888) | 4.7 (15) | Free | Utilities | ## More apps by angel garcia rubio - [Operation Bikini](https://appshunter.io/ios/app/operation-bikini/id884724284) - [Day of the Vogons](https://appshunter.io/ios/app/day-of-the-vogons/id1240928657) All apps by angel garcia rubio: https://appshunter.io/developer/729430853 --- *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 2026-06-10.*