# HP41CV vs RLM

The clearest difference is rating: RLM at 5.0 against HP41CV's 2.8. RLM also leads on update cadence (every 4 weeks vs every 73 months). HP41CV's advantage is in-app purchases (none vs 1) and ratings volume (22 vs 1). 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. HP41CV asks for nothing beyond the download.

RLM holds the better App Store score, 5.0 against 2.8. That said, the two scores are not equally well evidenced: HP41CV has 22 ratings behind it against 1, so its average is the more settled of the two.

HP41CV ships an update every 73 months, RLM every 4 weeks. The most recent releases landed on October 24, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | HP41CV | RLM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (22 ratings)](https://appshunter.io/ios/app/hp41cv/id1214637000/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rlm-10cx/id6466089794/reviews)** |
| Number of ratings | **22** | 1 |
| Positive reviews | 11.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 73 months | **Every 4 weeks** |
| Monetization | Free | Free |
| 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-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 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 5.0 from 1 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 4 weeks. Most recently, HP41CV was updated on October 24, 2026 and RLM on September 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.*