RMU3 Config vs Bad Elf Flex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RMU3 Config
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.
- Bluetooth configuration interface
- Remote monitoring of cathodic protection rectifiers
- Full RMU3 configuration
- View readings and limits
- Diagnostic status screen
- Integrated manual and wiring diagrams
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*** Requires a corTalk® RBT1 or RMU123PGM and RMU3 to use. *** Contact us at 'sales.rmu3@mobiltex.com' to purchase. This app is for configuring the corTalk® RMU3 (Remote Monitoring Unit 3) with a Bluetooth configuration interface. Both the RBT1 or RMU123PGM are compatible. They both function as a complete RMU3 programming interface but only requires the Bluetooth connection of your phone to use. The RMU3 is used to monitor a cathodic protection rectifier with accurate measurement of a wide variety of signals; it can also control the rectifier for survey operations by switching a relay at precisely timed intervals. This app allows access to diagnostic information on the RMU3 and allows setting up the configuration to meet the customer's needs. Note that measurement data logs, due to their size, can only be extracted from the RMU3 using the PC configuration application through the USB port. The app allows full configuration of the RMU3 including - slot measurement types - limits - slot scaling and offset - relay options - instant off timing - interruption On/Off/Cycle Other features include the - viewing of readings and their limits - detailed status screen for troubleshooting - integrated manual - wiring diagrams for each measurement type The RBT1 and RMU123PGM is always in a Bluetooth pairing mode and requires a pairing code entered on the app. The pairing code (default=123456) can be found and changed with the app. Once paired, the iOS device can reconnect without needing to re-enter the code. The RBT1 pairing code can be reset by tapping the RBT1 5 times in 10 seconds with a user-supplied magnet.
Bad Elf Flex
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.
- Monitor GNSS receiver health
- Change hardware settings
- Perform firmware updates
- Purchase and load Flex Tokens
- Enable hardware-based features
- Access correction sources
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This is the free companion utility app for the flexible, intuitive, and affordable Bad Elf Flex and Flex Mini GNSS receivers. Designed for GIS and survey professionals, the Bad Elf Flex and Flex Mini connect to your iPhone or iPad via Bluetooth and provide high-accuracy location data to ANY and ALL field data collection apps in your workflow. This app allows you to view the health of the Flex and Flex Mini hardware, change settings, and perform firmware updates. For the Bad Elf Flex, the app also supports purchasing and loading Flex Tokens into the hardware for enabling hardware-based features and correction sources. Several correction sources are supported including SBAS, RTK via NTRIP, and Atlas (L-band) satellite corrections. Visit https://bad-elf.com/ to learn more about the Bad Elf Flex and Flex Mini GNSS receivers. NOTES: * This app requires a Bad Elf Flex or Flex Mini to operate. * Our "Bad Elf GPS" companion app supports our legacy mapping-grade receivers: Bad Elf GPS Pro, GPS Pro+, Surveyor, and GPS for Lightning dongle. * Continued use of the GPS running in the background can dramatically decrease battery life.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | RMU3 Config | Bad Elf Flex |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) | 3.6 (14 ratings) — better |
| Positive reviews | — | 40.0% of reviews |
| Number of ratings | 1 | 14 — better |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.5 — better |
| Further details — not scored | ||
| Size | 23 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | Mobiltex Data | Bad Elf, LLC. |
Customer experience
RMU3 Config
Bad Elf Flex
In-app purchases
RMU3 Config
No in-app purchases
Bad Elf Flex
No in-app purchases
Questions
Is RMU3 Config free?
Is Bad Elf Flex free?
Which has better reviews, RMU3 Config or Bad Elf Flex?
Do RMU3 Config or Bad Elf Flex have ads?
Which is updated more often, RMU3 Config or Bad Elf Flex?
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