# RPN vs RLM

The clearest difference is review sentiment: RPN at 93% against RLM's 40%. RPN also leads on rating (4.6 vs 3.1) and in-app purchases (none vs 4). RLM's advantage is price (Free vs $3.99) and update cadence (every 5 weeks vs every 3 months). On ratings volume, ads and device support there is nothing between them.

RLM is free to download; RPN costs $3.99 up front. RLM sells 4 in-app purchases, starting at $0.49 per month. RPN asks for nothing beyond the download.

RPN holds the better App Store score, 4.6 against 3.1. Both are backed by a comparable volume of ratings — 17 and 7 respectively. Written reviews point the same way: 93% of RPN's written reviews are positive against 40% of RLM's.

RPN ships an update every 3 months, RLM every 5 weeks. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | RPN | RLM |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.6 (17 ratings)](https://appshunter.io/ios/app/rpn-67-sd/id1109722386/reviews)** | [3.1 (7 ratings)](https://appshunter.io/ios/app/rlm-11cx/id1630739014/reviews) |
| Number of ratings | **17** | 7 |
| Positive reviews | **92.9% of reviews** | 40.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 63 MB | 6 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| 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-67-sd/id1109722386)

This app simulates a vintage programmable calculator from the mid-70s, offering enhanced features beyond the original. It allows users to run existing programs, manage virtual cards, and utilize advanced functions for scientific and engineering tasks.

**Highlights:** Virtual program and data cards, Virtual paper tape printer, Database-driven card manager, Create, label, and organize unlimited cards, Share cards via email, AirDrop, Dropbox, Editable program listings, Enhanced features for more program steps and registers

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

**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 RPN free?

RPN costs $3.99, 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?

RPN is rated higher. RPN averages 4.6 out of 5 from 17 ratings, while RLM averages 3.1 from 7 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 every 5 weeks. Most recently, RPN was updated on November 4, 2026 and RLM on November 3, 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.*