Bad Elf Flex vs Proceq GPR Subsurface
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Proceq GPR Subsurface
This application uses radar technology to create detailed 3D images of underground structures. It helps detect utilities, verify as-built maps, and perform structural investigations with intuitive on-site analysis and cloud collaboration features.
- Subsurface 3D imaging
- Utility line detection
- As-built map verification
- Real-time Augmented Reality visualization
- On-site data annotation
- Cloud-based collaboration and export
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Proceq GPR Subsurface: Powerful sensors with radar beams for subsurface mapping applications. Intelligent software at your fingertips. The mission behind Proceq GPR Subsurface is simple: Scan the underground to provide a clear 3D image of what lies beneath, to detect and map the findings effortlessly and reliably, and to collaborate anywhere, anytime, for utility strike prevention, as-built map verification, structural investigations and various geophysical applications. The revolutionary Proceq GS series is the world’s most advanced subsurface mapping system, equipped with Stepped-Frequency Continuous-Wave (SFCW) technology and precise GNSS positioning. The true-ultrawideband antenna system and Swiss-made, optimized electronics deliver unparalleled resolution and penetration depth - at the same time. The magic starts once you connect the GS9000 or GS8000 wireless to your iPad and fire up the Proceq GPR Subsurface app. The carefully designed user interface increases your productivity by making measurements and analysis simple and intuitive; for example, by switching between top and sectional views with a simple gesture. A rich feature set brings advanced workflows on-site, so that you can get more things done while in the field. See the heatmap of the subsurface form in front of your eyes at the specified depth range, annotate your findings with precise geolocation, tags, photos, voice memos and comments in the logbook. Access and share them with colleagues anywhere, anytime, and export your measurements in one click, in the form of rich reports, the most common CAD/GIS mapping formats, or raw data for further processing, all over the cloud. Detect utility lines and label them accordingly to produce as-built maps, or digitize any other findings on the ground. Get an instant understanding of what is below your feet with the revolutionary Free Path 3D real-time visualization, or superimpose your area scans onto the real world with Augmented Reality - unique features in the industry. Download the free app now and explore the state of the art of subsurface mapping with the included demo files.
Screenshots
Verdict
The clearest difference is rating: Proceq GPR Subsurface at 5.0 against Bad Elf Flex's 3.6. Proceq GPR Subsurface also leads on review sentiment (50% vs 40%). Bad Elf Flex's advantage is monetization model (free vs free with in-app purchases) and ratings volume (14 vs 3). On price, update cadence, ads and in-app purchases 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.
Proceq GPR Subsurface holds the better App Store score, 5.0 against 3.6. Both are backed by a comparable volume of ratings — 14 and 3 respectively. Written reviews point the same way: 40% of Bad Elf Flex's written reviews are positive against 50% of Proceq GPR Subsurface's.
Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 9, 2026 and September 15, 2026 respectively.
| Parameter | Bad Elf Flex | Proceq GPR Subsurface |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (14 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 40.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 14 — better | 3 |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 15.5 — better | 16.0 |
| Further details — not scored | ||
| Size | 32 MB | 1.1 GB |
| Age rating | 4+ | 4+ |
| Developer | Bad Elf, LLC. | Screening Eagle Technologies |
Customer experience
Bad Elf Flex
Proceq GPR Subsurface
In-app purchases
Bad Elf Flex
No in-app purchases
Proceq GPR Subsurface
No in-app purchases
Questions
Is Bad Elf Flex free?
Is Proceq GPR Subsurface free?
Which has better reviews, Bad Elf Flex or Proceq GPR Subsurface?
Do Bad Elf Flex or Proceq GPR Subsurface have ads?
Which is updated more often, Bad Elf Flex or Proceq GPR Subsurface?
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