Comparison

SODMAP Mobile vs Bad Elf Flex

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SODMAP Mobile

This app helps users identify and assess the risk of Sudden Oak Death (SOD) in their area. It visualizes disease distribution, provides risk assessments based on proximity to confirmed cases, and encourages participation in surveys to improve data.

Highlights
  • Visualize SOD distribution with geo-location
  • View confirmed SOD-positive and negative specimens
  • Identify tree locations with pins
  • Assess SOD infection risk
  • Determine local disease incidence
  • Receive warnings for insufficient data
Features
Read full description

Sudden Oak Death (SOD) is an emergent disease caused by an exotic invasive pathogen affecting millions of oak and tanoak trees in California and Southern Oregon, and has the potential to spread to many other forests worldwide. It is currently one of the most regulated plant pathogens by most governments in the world. Besides infecting trees, the microbe that causes SOD may also be present in soil and in water bodies such as rivers, streams, and ponds. The SODMAP project (www.sodmap.org) is a collaboration of researchers, government organizations, and citizen-scientists working together to create one of the most complete distribution maps of a forest disease ever produced in North America. The UC Berkeley Forest Pathology and Mycology Laboratory (www.matteolab.org) SODMAP Mobile app extends this functionality to include: · Geo-location to visualize SOD distribution in relation to the user's location. · Laboratory confirmed SOD-positive, as well as, SOD-negative specimens to better illustrate the range and distribution of the disease. · Easy to identify tree location pins. · Risk assessment for SOD infection, based on the proximity of the user to laboratory confirmed cases of SOD. · Quick determination of local incidence of the disease and whether data are current or not for the local area. · Warning of insufficient surveying or a lack of current information about SOD distribution in the user's area. In case of insufficient availability of local data, the user is warned about the impossibility of determining risk and is prompted to participate in the volunteer SOD Blitz surveys (www.sodblitz.org) organized in the Spring of each year. SOD is an infectious and deadly tree disease, but contagion to oaks occurs only at short distances from previously infected trees. Knowledge of current fine-scale distribution of the disease is the key to its timely management. Treatments are available, but must be administered preventively, before oaks are infected. The SODMAP Mobile app is an aid to land owners and open space managers that will enable them to locate the nearest confirmed outbreaks of SOD, and to determine the risk of infection. It will also inform hikers and mountain bikers about the presence of SOD in recreational areas, indicating whether care should be given to prevent the further spread of the disease by the movement of infested soil. Finally, tree care specialists will use this SODMAP Moblie to determine the level SOD infestation and to design appropriate landscape management programs. To learn more about SOD and get involved in the SODMAP surveys, visit www.sodblitz.org This project made possible thanks to funding from: USDA Forest Service, State and Private Forestry The Gordon and Betty Moore Foundation

About

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.

Highlights
  • Monitor GNSS receiver health
  • Change hardware settings
  • Perform firmware updates
  • Purchase and load Flex Tokens
  • Enable hardware-based features
  • Access correction sources
Features
Read full description

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

SODMAP Mobile3 screens
Bad Elf Flex4 screens

Verdict

The call

The clearest difference is rating: SODMAP Mobile at 4.0 against Bad Elf Flex's 3.6. SODMAP Mobile also leads on review sentiment (50% vs 40%) and iOS requirement (6.0 vs 15.5). Bad Elf Flex's advantage is update cadence (every 2 months vs every 4 months) and ratings volume (14 vs 3). 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

SODMAP Mobile holds the better App Store score, 4.0 against 3.6. Both are backed by a comparable volume of ratings — 3 and 14 respectively. Written reviews point the same way: 50% of SODMAP Mobile's written reviews are positive against 40% of Bad Elf Flex's.

UpkeepUpdate frequency

SODMAP Mobile ships an update every 4 months, Bad Elf Flex every 2 months. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.

Scorecard5 real differences · 5 level
SODMAP Mobile versus Bad Elf Flex: the parameters behind the verdict, then further details
ParameterSODMAP MobileBad Elf Flex
PriceFreeFree
Rating4.0 (3 ratings) — better3.6 (14 ratings)
Positive reviews50.0% of reviews — better40.0% of reviews
Number of ratings314 — better
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS6.0 — better15.5
Further details — not scored
Size1 MB33 MB
Age rating4+4+
DeveloperDoug SchmidtBad Elf, LLC.

Customer experience

SODMAP Mobile

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Bad Elf Flex

All ratings14 ratings
Positive57.1%
Neutral14.3%
Negative28.6%
Written reviews5 reviews
Positive40.0%
Neutral0.0%
Negative60.0%

In-app purchases

None

SODMAP Mobile

No in-app purchases

None

Bad Elf Flex

No in-app purchases

Questions

Is SODMAP Mobile free?
SODMAP Mobile 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, SODMAP Mobile or Bad Elf Flex?
SODMAP Mobile is rated higher. SODMAP Mobile averages 4.0 out of 5 from 3 ratings, while Bad Elf Flex averages 3.6 from 14 ratings.
Do SODMAP Mobile or Bad Elf Flex have ads?
Neither SODMAP Mobile nor Bad Elf Flex shows ads.
Which is updated more often, SODMAP Mobile or Bad Elf Flex?
SODMAP Mobile ships an update every 4 months, and Bad Elf Flex every 2 months. Most recently, SODMAP Mobile was updated on October 3, 2026 and Bad Elf Flex on October 12, 2026.

Other comparisons