# RPN vs RLM

The clearest difference is price: RLM at Free against RPN's $4.99. RLM also leads on update cadence (monthly vs every 3 months). RPN's advantage is in-app purchases (none vs 1) and ratings volume (11 vs 1). On rating, ads and device support there is nothing between them.

RLM is free to download; RPN costs $4.99 up front. RLM sells 1 one-off in-app purchase. RPN asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for RPN against 5.0 for RLM. That said, the two scores are not equally well evidenced: RPN has 11 ratings behind it against 1, so its average is the more settled of the two.

RPN ships an update every 3 months, RLM monthly. The most recent releases landed on November 1, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | RPN | RLM |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.9 (11 ratings)](https://appshunter.io/ios/app/rpn-97-pro/id816249055/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rlm-10cx/id6466089794/reviews)** |
| Number of ratings | **11** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 75 MB | 7 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [R.L.M. Software](https://appshunter.io/developer/289639238) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn-97-pro/id816249055)

This app simulates a legendary 1970s programmable calculator, offering advanced features for scientists and engineers. It allows users to run programs, manage virtual cards, and access hundreds of free program cards from its website.

**Highlights:** Virtual program and data cards, Virtual paper tape printer, Database-driven card manager, Create, label, and organize unlimited cards, Effortless saving of card collections, Formatted program listings, Live display of stack and registers

**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 RPN free?

RPN costs $4.99, with no in-app purchases.

### Is RLM free?

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

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

RLM is rated higher. RPN averages 4.9 out of 5 from 11 ratings, while RLM averages 5.0 from 1 ratings.

### Do RPN or RLM have ads?

Neither RPN nor RLM shows ads.

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

RPN ships an update every 3 months, and RLM monthly. Most recently, RPN was updated on November 1, 2026 and RLM on November 12, 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.*