# CMCalc vs bcRPN

The clearest difference is rating: bcRPN at 4.8 against CMCalc's 4.5. bcRPN also leads on update cadence (every 22 months vs every 45 months). CMCalc's advantage is iOS requirement (12.0 vs 15.0). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

bcRPN holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 6 and 4 respectively. Written reviews point the same way: 75% of CMCalc's written reviews are positive against 80% of bcRPN's.

CMCalc ships an update every 45 months, bcRPN every 22 months. The most recent releases landed on September 7, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | CMCalc | bcRPN |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (6 ratings)](https://appshunter.io/ios/app/cmcalc/id974432836/reviews) | **[4.8 (4 ratings)](https://appshunter.io/ios/app/bcrpn/id1614744829/reviews)** |
| Number of ratings | **6** | 4 |
| Positive reviews | 75.0% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 22 months** |
| Monetization | Free | Free |
| Size | 4 MB | 0 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [William David](https://appshunter.io/developer/974432835) | [Paul Wilkins](https://appshunter.io/developer/1614739840) |

## What reviewers say

### CMCalc

[App page](https://appshunter.io/ios/app/cmcalc/id974432836)

This app emulates a classic 1980s computer math calculator, offering decimal arithmetic, binary conversions, and logic functions. It supports parentheses for complex calculations and includes modern features like copy/paste and landscape mode.

**Highlights:** Decimal arithmetic, Binary conversions (decimal, binary, octal, hexadecimal), Binary logic functions, Operator grouping with parentheses, Hexadecimal input (A-F), Copy and paste results/functions, Landscape mode

**Features:** macOS Compatibility

**In-app purchases:** none


### bcRPN

[App page](https://appshunter.io/ios/app/bcrpn/id1614744829)

This utility app functions as a Reverse Polish Notation calculator. It handles complex numbers and utilizes extended precision for all calculations, offering an unlimited stack depth and an undo feature for up to 10 operations.

**Highlights:** Reverse Polish Notation (RPN) input, Complex number calculations, Extended precision math, Unlimited stack depth, Undo functionality (up to 10 operations)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CMCalc free?

CMCalc is free to download, with no in-app purchases.

### Is bcRPN free?

bcRPN is free to download, with no in-app purchases.

### Which has better reviews, CMCalc or bcRPN?

bcRPN is rated higher. CMCalc averages 4.5 out of 5 from 6 ratings, while bcRPN averages 4.8 from 4 ratings.

### Do CMCalc or bcRPN have ads?

Neither CMCalc nor bcRPN shows ads.

### Which is updated more often, CMCalc or bcRPN?

CMCalc ships an update every 45 months, and bcRPN every 22 months. Most recently, CMCalc was updated on September 7, 2026 and bcRPN on September 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*