# RLM vs Lambda Mu 25

The clearest difference is in-app purchases: Lambda Mu 25 at none against RLM's 4. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. RLM sells 4 in-app purchases, starting at $0.49 per month. Lambda Mu 25 asks for nothing beyond the download.

## The numbers

| Metric | RLM | Lambda Mu 25 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (17 ratings)](https://appshunter.io/ios/app/rlm-15cx/id1636646608/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 13 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [R.L.M. Software](https://appshunter.io/developer/289639238) | [Poznan Supercomputing and Networking Center](https://appshunter.io/developer/726093818) |

## What reviewers say

### 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 |


### Lambda Mu 25

[App page](https://appshunter.io/ios/app/lambda-mu-25/id6809826587)

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

**In-app purchases:** none


## Frequently asked questions

### Is RLM free?

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

### Is Lambda Mu 25 free?

Lambda Mu 25 is free to download, with no in-app purchases.

### Do RLM or Lambda Mu 25 have ads?

Neither RLM nor Lambda Mu 25 shows ads.

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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.*