# MathU RPN Calc vs RLM

The clearest difference is review sentiment: MathU RPN Calc at 93% against RLM's 0%. MathU RPN Calc also leads on in-app purchases (none vs 4) and chart position (#132 vs unranked). RLM's advantage is price (Free vs $24.99). On update cadence, 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 4 in-app purchases, starting at $0.49 per month. MathU RPN Calc asks for nothing beyond the download.

MathU RPN Calc ships an update every 6 weeks, RLM every 2 months. The most recent releases landed on October 27, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | MathU RPN Calc | RLM |
| --- | --- | --- |
| Price | $24.99 | **Free** |
| Rating | **[5.0 (148 ratings)](https://appshunter.io/ios/app/mathu-rpn-calc/id293653078/reviews)** | — |
| Number of ratings | **148** | — |
| Positive reviews | **92.5% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#132** | — |
| Size | 8 MB | 7 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:** #132 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-10bx/id1563019331)

This app simulates a powerful financial calculator, offering extensive tools for business, finance, statistics, and scientific calculations. It provides worksheets for loan amortization, bond pricing, currency exchange, and more, all within an intuitive interface designed for iOS devices.

**Highlights:** Finance worksheets (amortization, bond price, time value of money), Business calculations (bill split, break-even, currency exchange), Cash flow analysis, Statistical functions, Scientific and trigonometric functions, Unit and currency conversions, Date and time calculations, 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 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 2 months. Most recently, MathU RPN Calc was updated on October 27, 2026 and RLM on October 16, 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.*