# ROL Assistant vs LMF CompXpert

The clearest difference is update cadence: ROL Assistant at every 4 months against LMF CompXpert's every 12 months. ROL Assistant also leads on iOS requirement (11.4 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ROL Assistant ships an update every 4 months, LMF CompXpert every 12 months. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ROL Assistant | LMF CompXpert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rol-assistant/id775678395/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 12 months |
| Monetization | Free | — |
| Size | 28 MB | 154 MB |
| Requires iOS | **11.4** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Astron International, Inc.](https://appshunter.io/developer/775678398) | [Leobersdorfer Maschinenfabrik GmbH](https://appshunter.io/developer/1590990584) |

## What reviewers say

### ROL Assistant

[App page](https://appshunter.io/ios/app/rol-assistant/id775678395)

This utility app provides a virtual advisor for refining questions and offers extensive unit conversion tools. It also calculates steam properties and line pressure drops for various pipe materials and sizes.

**Highlights:** Virtual refining advisor, Extensive unit conversions, Steam properties calculator, Line pressure drop calculation, English and Metric units

**Features:** macOS Compatibility

**In-app purchases:** none


### LMF CompXpert

[App page](https://appshunter.io/ios/app/lmf-compxpert/id1608167192)

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

**In-app purchases:** none


## Frequently asked questions

### Is ROL Assistant free?

ROL Assistant is free to download, with no in-app purchases.

### Is LMF CompXpert free?

LMF CompXpert is free to download, with no in-app purchases.

### Do ROL Assistant or LMF CompXpert have ads?

Neither ROL Assistant nor LMF CompXpert shows ads.

### Which is updated more often, ROL Assistant or LMF CompXpert?

ROL Assistant ships an update every 4 months, and LMF CompXpert every 12 months. Most recently, ROL Assistant was updated on October 13, 2026 and LMF CompXpert on October 10, 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.*