# iHP48 vs RLM

The clearest difference is rating: iHP48 at 4.6 against RLM's 4.1. iHP48 also leads on in-app purchases (none vs 4) and ratings volume (302 vs 18). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. RLM sells 4 in-app purchases, starting at $0.49 per month. iHP48 asks for nothing beyond the download.

iHP48 holds the better App Store score, 4.6 against 4.1. That said, the two scores are not equally well evidenced: iHP48 has 302 ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 88% of iHP48's written reviews are positive against 80% of RLM's.

Both ship on a similar rhythm, roughly monthly. Both last shipped on November 3, 2026.

## The numbers

| Metric | iHP48 | RLM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (302 ratings)](https://appshunter.io/ios/app/ihp48/id1549608953/reviews)** | [4.1 (18 ratings)](https://appshunter.io/ios/app/rlm-15cx/id1636646608/reviews) |
| Number of ratings | **302** | 18 |
| Positive reviews | **88.3% of reviews** | 80.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 6 MB | 6 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alexis Lorca](https://appshunter.io/developer/1549608955) | [R.L.M. Software](https://appshunter.io/developer/289639238) |

## What reviewers say

### iHP48

[App page](https://appshunter.io/ios/app/ihp48/id1549608953)

This app brings the powerful HP48 calculator experience to your mobile device. It offers enhanced performance, seamless file management, and a customizable interface with support for various HP calculator models. Enjoy a familiar and convenient calculator solution without needing extra hardware.

**Highlights:** Supports HP38, HP39, HP48, HP49, HP50 calculators, Haptic feedback and customizable zoom options, Seamless file transfer via iTunes and Files app, Cloud storage integration (iCloud, OneDrive, Dropbox), Object saving/loading and copy/paste functionality, Access to calculator packages, skins, and ROMs, Internal file manager and extensible settings

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Excellent emulation of HP48
- 👍 Familiar and nostalgic feel
- 👍 Comprehensive functionality
- 👍 Customizable skins
- 👍 Haptic feedback

**What reviewers complain about**

- 🐛 Occasional crashes or freezes
- 🐛 Missed keystrokes when typing quickly
- 🐛 Blank or flickering display
- 🐛 Compatibility issues with newer iOS versions

**Reported bugs**

- Crashes on startup
- Inability to save state across sessions
- Incompatibility with certain iOS devices

**Requested features**

- Dark mode option
- Ability to disable haptic feedback
- Support for HP50G emulation
- Improved keyboard mapping and arrow key functionality


### RLM

[App page](https://appshunter.io/ios/app/rlm-15cx/id1636646608)

This advanced scientific calculator emulates the functionality of the HP-15C, offering comprehensive tools for finance, business, statistics, and scientific calculations. It supports programming, equation solving, and unit conversions, optimized for iOS devices.

**Highlights:** Programmable advanced scientific calculator, Finance and business calculation menus, Statistics and probability functions, Complex numbers and matrix operations, Unit and currency conversions, Equation solver and programming capabilities

**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 |
| One-Time Purchase | $9.99 | one-time |


## Frequently asked questions

### Is iHP48 free?

iHP48 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, iHP48 or RLM?

iHP48 is rated higher. iHP48 averages 4.6 out of 5 from 302 ratings, while RLM averages 4.1 from 18 ratings.

### Do iHP48 or RLM have ads?

Neither iHP48 nor RLM shows ads.

### Which is updated more often, iHP48 or RLM?

iHP48 ships an update monthly, and RLM monthly. Most recently, iHP48 was updated on November 3, 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.*