# x36 vs RLM

The clearest difference is price: RLM at Free against x36's $0.99. RLM also leads on update cadence (every 4 weeks vs every 2 months). x36's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 15.0). On rating, ratings volume, ads and device support there is nothing between them.

RLM is free to download; x36 costs $0.99 up front. RLM sells 1 one-off in-app purchase. x36 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for x36 against 5.0 for RLM. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

x36 ships an update every 2 months, RLM every 4 weeks. The most recent releases landed on October 24, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | x36 | RLM |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/x36/id1443849416/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/rlm-10cx/id6466089794/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 6 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carl Cook](https://appshunter.io/developer/897666025) | [R.L.M. Software](https://appshunter.io/developer/289639238) |

## What reviewers say

### x36

[App page](https://appshunter.io/ios/app/x36/id1443849416)

This app offers a powerful scientific and engineering calculator with advanced features like programmability, multiple number bases, and statistical functions. It emulates the functionality of calculators from the 70s and 80s, providing over 100 functions for complex calculations.

**Highlights:** Programmability with 1000 steps, Trigonometric functions with selectable units, Statistical functions and linear regression, Four number bases (Decimal, Hex, Octal, Binary), Metric-English conversions, Fraction operations, Over 100 functions

**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 x36 free?

x36 costs $0.99, with no in-app purchases.

### Is RLM free?

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

### Which has better reviews, x36 or RLM?

x36 and RLM are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do x36 or RLM have ads?

Neither x36 nor RLM shows ads.

### Which is updated more often, x36 or RLM?

x36 ships an update every 2 months, and RLM every 4 weeks. Most recently, x36 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.*