# bcRPN vs RLM

The clearest difference is in-app purchases: bcRPN at none against RLM's 1. bcRPN also leads on ratings volume (4 vs 1). RLM's advantage is update cadence (every 4 weeks vs every 22 months) and rating (5.0 vs 4.8). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. RLM sells 1 one-off in-app purchase. bcRPN asks for nothing beyond the download.

RLM holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

bcRPN ships an update every 22 months, RLM every 4 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) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rlm-10cx/id6466089794/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 4 weeks** |
| Monetization | Free | Free |
| 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-10cx/id6466089794)

This scientific calculator offers a comprehensive suite of tools for finance, business, statistics, and complex scientific calculations. It emulates a classic calculator while leveraging modern iOS device capabilities for ease of use and advanced functions.

**Highlights:** Finance and Business calculations, Date and Time interval calculations, Advanced Statistics and Curve Fitting, Complex Numbers and 3D Vectors, Unit and Currency Conversions, Equation Solver, Programmable functions

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 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?

RLM is rated higher. bcRPN averages 4.8 out of 5 from 4 ratings, while RLM averages 5.0 from 1 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 4 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.*