# HP41CV vs RLM

The clearest difference is in-app purchases: HP41CV at none against RLM's 4. HP41CV also leads on ratings volume (22 vs 7). RLM's advantage is update cadence (every 5 weeks vs every 73 months) and review sentiment (40% vs 12%). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. RLM sells 4 in-app purchases, starting at $0.49 per month. HP41CV asks for nothing beyond the download.

RLM holds the better App Store score, 3.1 against 2.8. Both are backed by a comparable volume of ratings — 22 and 7 respectively. Written reviews point the same way: 12% of HP41CV's written reviews are positive against 40% of RLM's.

HP41CV ships an update every 73 months, RLM every 5 weeks. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | HP41CV | RLM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (22 ratings)](https://appshunter.io/ios/app/hp41cv/id1214637000/reviews) | **[3.1 (7 ratings)](https://appshunter.io/ios/app/rlm-11cx/id1630739014/reviews)** |
| Number of ratings | **22** | 7 |
| Positive reviews | 11.8% of reviews | **40.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 73 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 8 MB | 6 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jurgen Anton Strohmer](https://appshunter.io/developer/1214636999) | [R.L.M. Software](https://appshunter.io/developer/289639238) |

## What reviewers say

### HP41CV

[App page](https://appshunter.io/ios/app/hp41cv/id1214637000)

Experience the functionality of a classic 90s pocket calculator on your iPhone. This app offers UPN calculation with a basic course for new users. Many core functions are available for free, with advanced features offered as optional upgrades.

**Highlights:** HP-41 CV calculator emulation, UPN (Reverse Polish Notation) calculation, Basic UPN course with examples, Core functions available for free, Optional advanced features

**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 HP41CV free?

HP41CV 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, HP41CV or RLM?

RLM is rated higher. HP41CV averages 2.8 out of 5 from 22 ratings, while RLM averages 3.1 from 7 ratings.

### Do HP41CV or RLM have ads?

Neither HP41CV nor RLM shows ads.

### Which is updated more often, HP41CV or RLM?

HP41CV ships an update every 73 months, and RLM every 5 weeks. Most recently, HP41CV was updated on October 24, 2026 and RLM on October 30, 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.*