# i48 vs RLM

The clearest difference is rating: RLM at 5.0 against i48's 3.4. RLM also leads on update cadence (monthly vs every 4 months). i48's advantage is in-app purchases (none vs 4) and ratings volume (207 vs 1). On price, review sentiment, 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. i48 asks for nothing beyond the download.

RLM holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: i48 has 207 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 54% and 53% positive.

i48 ships an update every 4 months, RLM monthly. The most recent releases landed on October 31, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | i48 | RLM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (207 ratings)](https://appshunter.io/ios/app/i48/id329454950/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rlm-17bx-calculator/id1593889938/reviews)** |
| Number of ratings | **207** | 1 |
| Positive reviews | **54.2% of reviews** | 53.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 4 MB | 7 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Automagic Software Pty Ltd](https://appshunter.io/developer/329454953) | [R.L.M. Software](https://appshunter.io/developer/289639238) |

## What reviewers say

### i48

[App page](https://appshunter.io/ios/app/i48/id329454950)

This application emulates the HP48GX calculator on your iPhone or iPod touch. It allows you to perform complex calculations like matrix operations and function integration on the go.

**Highlights:** HP48GX calculator emulation, Matrix calculations, Function integration, Mobile calculator, On-the-go calculations

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Realistic HP48 emulation
- 🚀 Great functionality and features
- 💡 Useful unit conversions
- 👍 Familiar interface for HP48 users

**What reviewers complain about**

- 🐛 Freezes and crashes
- 🐛 Unresponsive buttons and input issues
- 🐛 Compatibility issues with newer iOS versions
- 🔋 Performance and battery drain problems

**Reported bugs**

- Memory recovery prompt not working
- Cursor keys behaving erratically
- Equation solver locking up the app
- Keyboard issues on certain devices

**Requested features**

- Landscape mode support
- Improved display resolution and graphics
- Haptic feedback for button presses
- Ability to assign units to numbers


### RLM

[App page](https://appshunter.io/ios/app/rlm-17bx-calculator/id1593889938)

This app offers a comprehensive suite of calculators for finance, business, science, and general use. It includes specialized worksheets for loans, investments, statistics, and complex mathematical functions, designed to leverage iOS device capabilities.

**Highlights:** Finance worksheets (amortization, bond pricing, options), Business calculations (bill split, break-even, currency), Statistical analysis (probability, regressions), Scientific functions (complex numbers, vectors), Unit and currency conversions, Equation solver, Date and time calculations

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Virtual Battery | $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 i48 free?

i48 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, i48 or RLM?

RLM is rated higher. i48 averages 3.4 out of 5 from 207 ratings, while RLM averages 5.0 from 1 ratings.

### Do i48 or RLM have ads?

Neither i48 nor RLM shows ads.

### Which is updated more often, i48 or RLM?

i48 ships an update every 4 months, and RLM monthly. Most recently, i48 was updated on October 31, 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.*