# MathU RPN Calc vs RLM

The clearest difference is price: RLM at Free against MathU RPN Calc's $24.99. RLM also leads on update cadence (every 4 days vs every 6 weeks). MathU RPN Calc's advantage is in-app purchases (none vs 1) and chart position (#136 vs unranked). On ads, device support and iOS requirement there is nothing between them.

RLM is free to download; MathU RPN Calc costs $24.99 up front. RLM sells 1 one-off in-app purchase. MathU RPN Calc asks for nothing beyond the download.

MathU RPN Calc ships an update every 6 weeks, RLM every 4 days. The most recent releases landed on October 31, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | MathU RPN Calc | RLM |
| --- | --- | --- |
| Price | $24.99 | **Free** |
| Rating | **[5.0 (149 ratings)](https://appshunter.io/ios/app/mathu-rpn-calc/id293653078/reviews)** | — |
| Number of ratings | **149** | — |
| Positive reviews | 92.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 days** |
| Monetization | Paid | — |
| Best chart rank | **#136** | — |
| Size | 8 MB | 3 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Creative Creek, LLC](https://appshunter.io/developer/293653081) | [R.L.M. Software](https://appshunter.io/developer/289639238) |

## What reviewers say

### MathU RPN Calc

[App page](https://appshunter.io/ios/app/mathu-rpn-calc/id293653078)

**Currently charting:** #136 Top Paid · Finance (US App Store)

This advanced scientific and financial calculator utilizes the Reverse Polish Notation (RPN) system. It offers over 96 functions, catering to professionals with features for finance, programming, and general scientific calculations. Optimized for iOS devices, it provides a robust and accurate computational experience.

**Highlights:** RPN entry system, Over 96 functions, Scientific calculations, Financial calculations (IRR, NPV, mortgage), Programmer's calculator (HEX, OCT, DEC, BIN), IEEE double precision accuracy, Portrait/landscape keypad switching

**Features:** Vision Pro support

**In-app purchases:** none


### RLM

[App page](https://appshunter.io/ios/app/rlm-14bx/id6499032999)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Purchase | $9.99 | one-time |


## Frequently asked questions

### Is MathU RPN Calc free?

MathU RPN Calc costs $24.99, with no in-app purchases.

### Is RLM free?

RLM is free to download, with in-app purchases available.

### Do MathU RPN Calc or RLM have ads?

Neither MathU RPN Calc nor RLM shows ads.

### Which is updated more often, MathU RPN Calc or RLM?

MathU RPN Calc ships an update every 6 weeks, and RLM every 4 days. Most recently, MathU RPN Calc was updated on October 31, 2026 and RLM on November 4, 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.*