# bcRPN vs RLM

The clearest difference is rating: bcRPN at 4.8 against RLM's 3.1. bcRPN also leads on in-app purchases (none vs 4) and review sentiment (80% vs 67%). RLM's advantage is update cadence (every 5 weeks vs every 22 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. RLM sells 4 in-app purchases, starting at $0.49 per month. bcRPN asks for nothing beyond the download.

bcRPN holds the better App Store score, 4.8 against 3.1. Both are backed by a comparable volume of ratings — 4 and 7 respectively. Written reviews point the same way: 80% of bcRPN's written reviews are positive against 67% of RLM's.

bcRPN ships an update every 22 months, RLM every 5 weeks. The most recent releases landed on September 19, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | bcRPN | RLM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/bcrpn/id1614744829/reviews)** | [3.1 (7 ratings)](https://appshunter.io/ios/app/rlm-11cx/id1630739014/reviews) |
| Number of ratings | 4 | **7** |
| Positive reviews | **80.0% of reviews** | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 0 MB | 6 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Paul Wilkins](https://appshunter.io/developer/1614739840) | [R.L.M. Software](https://appshunter.io/developer/289639238) |

## What reviewers say

### 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


### RLM

[App page](https://appshunter.io/ios/app/rlm-11cx/id1630739014)

This app is a scientific and programmable calculator designed for science and engineering, replicating the functionality of the HP-11C. It offers extensive features for finance, business, statistics, complex numbers, and unit conversions, with a programmable interface for custom calculations.

**Highlights:** Finance calculations (amortization, bond price, Black-Scholes), Business functions (break-even, currency exchange), Statistical analysis (regression, probability distributions), Scientific functions (complex numbers, logarithms, trigonometry), Unit and currency conversions, Programmable interface for custom scripts, Equation solver

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.49 | per month |
| Semi-Annual Subscription | $2.99 | per 6 months |
| Annual Subscription | $5.99 | per year |
| Lifetime Purchase | $9.99 | one-time |


## Frequently asked questions

### Is bcRPN free?

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

### Is RLM free?

RLM is free to download, with in-app purchases available.

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

bcRPN is rated higher. bcRPN averages 4.8 out of 5 from 4 ratings, while RLM averages 3.1 from 7 ratings.

### Do bcRPN or RLM have ads?

Neither bcRPN nor RLM shows ads.

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

bcRPN ships an update every 22 months, and RLM every 5 weeks. Most recently, bcRPN was updated on September 19, 2026 and RLM on September 10, 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.*