Bad Elf Flex 4+

Utility for Flex GNSS receiver

Bad Elf, LLC.

    • 3.6 • 10 Ratings
    • Free



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 to learn more about the Bad Elf Flex and Flex Mini GNSS receivers.


* This app requires a Bad Elf Flex or Flex Mini to operate.

* Our "Bad Elf GPS" companion app supports our 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.

What’s New

Version 1.3.3

This release includes the following fixes and updates:

[UI] Added speed/heading/altitude dashboard widgets
[UI] Fixed north/south deviation plot when using fixed center mode
[UI] Deviation plot now shows known location name in fixed center mode
[UI] Flex serial number now displayed in deviation plot, sat bar graph, and log list views
[UI] Fixed flow-to-3rd-party-app flow checklist for Flex Mini
[UI] Fixed bug preventing timed/tilt/raw point logging with Flex 5500/6500
[UI] Improved registration screen to prevent multiple registration events
[UI] Improved layout of Point One Navigation checklist
[UI] Fixed several other bugs including dark mode visibility

[NTRIP] Added "GPS lock" pre-req step to checklist
[NTRIP] Checklist allows location override for testing remote networks
[NTRIP] Checklist now includes diagnostics information useful for remote debugging
[NTRIP] Now filtering unused/unsupported RTCM messages to improve BT link robustness
[NTRIP] Fixed bug preventing mount point browsing on the AUSCORS network

Ratings and Reviews

3.6 out of 5
10 Ratings

10 Ratings

jazzwndsrf ,


The Flex is giving us sub-inch horizontal accuracies even with a moderately dense tree canopy and using the integrated antenna. Using with ArcGIS Collector and Spyglass.


GPS PRO is not supported

GPS PRO still selling at Amazon is not supported.

App Privacy

The developer, Bad Elf, LLC., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Identifiers
  • Usage Data

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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