# RB 20c Financial Calculator — HP-12C style RPN calculator

> HP-12C style RPN financial calculator for iOS devices. (iPhone/iPad app by Rodrigo Henrique Silva Barbosa.)

- Source: https://appshunter.io/ios/app/rb-20c-financial-calculator/id6821708021 (this page in markdown: same URL + `.md`)
- Developer: [Rodrigo Henrique Silva Barbosa](https://appshunter.io/developer/6821708023)
- Category: Finance, Productivity
- Price: Free
- Age rating: +4
- Requires: iOS 17.0 · 35 MB
- Languages: American English
- Released: 2026-10-15
- Data updated: 2026-10-18
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/rb-20c-financial-calculator/id6821708021/reviews.md

## What is RB 20c Financial Calculator?

RB 20c brings the classic HP-12C experience to your phone, using Reverse Polish Notation (RPN) and the same key layout financial professionals have relied on for decades.

Free version highlights:
- Four-level RPN stack with arithmetic, percentage, power and root operations.
- Memory registers (STO/RCL) with register arithmetic.
- Time value of money: n, i, PV, PMT and FV, solving for the unknown variable.
- Simple interest and period-by-period amortization (AMORT).
- Cash flow analysis with CF0, CFj and Nj, plus NPV and IRR.
- Statistics: sums, means, standard deviation and regression.
- Date calculations in D.MY and M.DY formats, including day counts and date differences.
- Bond price/yield and depreciation methods (SL, SOYD, DB).
- FIX, BEGIN and END modes.

Pro version (one-time purchase, no subscription):
- Text summary of your calculation, with and without fees, ready to copy and share.
- Export your cash flow to an Excel spreadsheet.
- Export your amortization table to an Excel spreadsheet.

No ads. No account required. Designed for landscape use.

## Key features

- RPN stack with arithmetic operations
- Time Value of Money calculations
- Cash flow analysis (NPV, IRR)
- Statistical functions
- Date calculations
- Bond pricing and depreciation
- Pro version export to Excel

## Is RB 20c Financial Calculator safe?

Not enough ratings yet to assess RB 20c Financial Calculator.

## Is RB 20c Financial Calculator legit?

RB 20c Financial Calculator has limited verification signals. The AppsHunter Legitimacy Score for RB 20c Financial Calculator is 58 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/rb-20c-financial-calculator/id6821708021/reviews.md

### 5/5 — Muito Boa!

*2026-10-15*

Melhor calculadora hp disponível para iphone

## Frequently asked questions about RB 20c Financial Calculator

### What is RB 20c?

RB 20c is a financial calculator app designed to emulate the experience of the classic HP-12C calculator. It utilizes Reverse Polish Notation (RPN) for calculations and offers a wide range of financial, statistical, and date functions.

### Does RB 20c have ads?

No, RB 20c is ad-free. The developers have stated that the app contains no advertisements, ensuring an uninterrupted user experience.

### What are the key financial functions in RB 20c?

RB 20c supports Time Value of Money (n, i, PV, PMT, FV), simple interest, period-by-period amortization, cash flow analysis (CF0, CFj, Nj, NPV, IRR), bond price/yield calculations, and depreciation methods.

### What is the difference between the free and Pro versions of RB 20c?

The Pro version of RB 20c, available as a one-time purchase, adds features like text summaries of calculations and the ability to export cash flow and amortization tables to Excel spreadsheets.

### On which devices can I use RB 20c?

RB 20c is compatible with iPhone and iPad devices. It is designed for landscape use to provide a familiar calculator layout.

### How often is RB 20c updated?

RB 20c was last updated on October 15, 2026, with version 1.0. As a new release, future update frequency will depend on developer plans and user feedback.

### Is RB 20c suitable for beginners?

While RB 20c offers advanced financial tools, its RPN input method may require some learning for users unfamiliar with it. However, the app provides a clear emulation of a widely used professional tool.

### What is the age rating for RB 20c?

RB 20c has an age rating of +4, indicating it is suitable for users aged four and above. It does not require an account to use.

## Version history (last 1 release)

### 1.0 — 2026-10-15

No release notes.

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*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 2026-10-18.*