# RMU3 Config vs Bad Elf Flex

The clearest difference is rating: Bad Elf Flex at 3.6 against RMU3 Config's 3.0. Bad Elf Flex also leads on ratings volume (14 vs 1) and update cadence (every 2 months vs every 4 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Bad Elf Flex holds the better App Store score, 3.6 against 3.0. That said, the two scores are not equally well evidenced: Bad Elf Flex has 14 ratings behind it against 1, so its average is the more settled of the two.

RMU3 Config ships an update every 4 months, Bad Elf Flex every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | RMU3 Config | Bad Elf Flex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/rmu3-config/id1089017766/reviews) | **[3.6 (14 ratings)](https://appshunter.io/ios/app/bad-elf-flex/id1486378497/reviews)** |
| Number of ratings | 1 | **14** |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 23 MB | 33 MB |
| Requires iOS | 15.6 | **15.5** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mobiltex Data](https://appshunter.io/developer/1050682800) | [Bad Elf, LLC.](https://appshunter.io/developer/391764721) |

## What reviewers say

### RMU3 Config

[App page](https://appshunter.io/ios/app/rmu3-config/id1089017766)

Configure and monitor cathodic protection rectifiers remotely. This app connects via Bluetooth to the RMU3 unit, allowing full control over settings, viewing diagnostic information, and managing measurement data. It requires specific hardware to function.

**Highlights:** Bluetooth configuration interface, Remote monitoring of cathodic protection rectifiers, Full RMU3 configuration, View readings and limits, Diagnostic status screen, Integrated manual and wiring diagrams

**Features:** Vision Pro support

**In-app purchases:** none


### Bad Elf Flex

[App page](https://appshunter.io/ios/app/bad-elf-flex/id1486378497)

This utility app enhances the functionality of Bad Elf Flex and Flex Mini GNSS receivers. It allows users to monitor hardware health, adjust settings, and update firmware. For the Flex model, it also enables the purchase and application of tokens for advanced features and correction sources like SBAS and RTK.

**Highlights:** Monitor GNSS receiver health, Change hardware settings, Perform firmware updates, Purchase and load Flex Tokens, Enable hardware-based features, Access correction sources

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RMU3 Config free?

RMU3 Config is free to download, with no in-app purchases.

### Is Bad Elf Flex free?

Bad Elf Flex is free to download, with no in-app purchases.

### Which has better reviews, RMU3 Config or Bad Elf Flex?

Bad Elf Flex is rated higher. RMU3 Config averages 3.0 out of 5 from 1 ratings, while Bad Elf Flex averages 3.6 from 14 ratings.

### Do RMU3 Config or Bad Elf Flex have ads?

Neither RMU3 Config nor Bad Elf Flex shows ads.

### Which is updated more often, RMU3 Config or Bad Elf Flex?

RMU3 Config ships an update every 4 months, and Bad Elf Flex every 2 months. Most recently, RMU3 Config was updated on November 2, 2026 and Bad Elf Flex on November 3, 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.*