Comparison

EDDMapS vs Project Monarch Science

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

Head to head
About

EDDMapS

Document and map the distribution of invasive species with this user-friendly system. It allows for easy data submission, visualization, and querying, aiding in early detection and rapid response efforts. All data is reviewed by experts for accuracy.

Highlights
  • Document invasive species distribution
  • User-friendly mapping system
  • Data submission and querying
  • Interactive maps
  • Expert data verification
  • Early Detection and Rapid Response support
Features
Read full description

EDDMapS is a mapping system for documenting invasive species distribution. It is fast, easy to use, and doesn't require Geographic Information Systems experience. Launched in 2005 by the Center for Invasive Species and Ecosystem Health at the University of Georgia, it was originally designed as a tool for state Exotic Pest Plant Councils to develop more complete distribution data of invasive species. EDDMapS goal is to maximize the effectiveness and accessibility of the immense numbers of invasive species observations recorded each year. Why do we care? An invasive species is when a nonnative species causes or is likely to cause economic, environmental harm, or harm to human health. Invasive species negatively impact agriculture, recreation, natural ecosystems, biodiversity, and more. The first step is prevention of nonnative introduction. The second step is to map where the invasive species are found in the introduced area. How does it work? EDDMapS is a platform to document, display, and query the presence of invasive species. A simple, interactive Web interface engages participants to submit their observations or view results through interactive queries into the EDDMapS database. EDDMapS encourages users to participate by providing Internet tools that maintain their personal records and enable them to visualize data with interactive maps. Users simply enter information from their observations into the standardized reporting form, which allows specific information about the infestation and images to be added. Uploaded data entered is immediately loaded to the database for verification. Once data is reviewed as correct by an expert, it is available for viewing and download. Being able to see the current data of a species as it moves into a new area helps to facilitate Early Detection and Rapid Response programs (EDRR). EDRR programs help stop or control an invasive species before it becomes an unmanageable problem. All data is reviewed by expert verifiers to ensure all data is accurate prior to public availability. The data is freely available to everyone including scientists, researchers, land managers, land owners, educators, conservationists, ecologists, farmers, foresters, state, and national parks.

About

Project Monarch Science

This app transforms your smartphone into a receiver for tiny tracking devices attached to monarch butterflies. By crowdsourcing data, it helps scientists monitor butterfly migration patterns in unprecedented detail, aiding conservation efforts.

Highlights
  • Crowdsourced tracking network
  • Monarch butterfly migration monitoring
  • Detailed movement data
  • Habitat conservation insights
  • Utilizes Bluetooth frequency
  • Citizen science participation
Features
Read full description

Project Monarch is an effort to leverage recent advances in tracking technology, that have enabled the development of the world’s smallest tracking devices, to track Monarch migration. The tracking devices on the monarch butterflies transmit at the same frequency as Bluetooth which means that everyone with a smartphone is carrying around a receiver in their pocket! This revolutionary approach can potentially create the largest wildlife tracking receiver network in the world, but only if members of the public download and use the free Project Monarch app. These data will allow scientists to track the movements of monarch butterflies in detail never previously imagined. We will see how monarchs utilize key stopping points along migratory routes and learn more about the speed and direction of migration, helping identify the most important sites for habitat conservation and restoration. Ultimately, this technology can help guide conservation planning and lead to increases in monarch populations.

Screenshots

EDDMapS4 screens
Project Monarch Science4 screens

Verdict

The call

The clearest difference is rating: EDDMapS at 4.7 against Project Monarch Science's 3.7. EDDMapS also leads on review sentiment (57% vs 45%) and ratings volume (120 vs 18). Project Monarch Science's advantage is update cadence (weekly vs monthly) and iOS requirement (15.0 vs 18.6). 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

EDDMapS holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: EDDMapS has 120 ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 57% of EDDMapS's written reviews are positive against 45% of Project Monarch Science's.

UpkeepUpdate frequency

EDDMapS ships an update monthly, Project Monarch Science weekly. The most recent releases landed on September 25, 2026 and September 21, 2026 respectively.

Scorecard5 real differences · 5 level
EDDMapS versus Project Monarch Science: the parameters behind the verdict, then further details
ParameterEDDMapSProject Monarch Science
PriceFreeFree
Rating4.7 (120 ratings) — better3.7 (18 ratings)
Positive reviews57.1% of reviews — better45.5% of reviews
Number of ratings120 — better18
Update frequencyMonthlyWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.615.0 — better
Further details — not scored
Size251 MB83 MB
Age rating4+4+
DeveloperCharles T. BargeronCellular Tracking Technologies

Customer experience

EDDMapS

All ratings120 ratings
Positive92.5%
Neutral3.3%
Negative4.2%
Written reviews14 reviews
Positive57.1%
Neutral7.1%
Negative35.7%

Project Monarch Science

All ratings18 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews11 reviews
Positive45.5%
Neutral0.0%
Negative54.5%

In-app purchases

None

EDDMapS

No in-app purchases

None

Project Monarch Science

No in-app purchases

Questions

Is EDDMapS free?
EDDMapS is free to download, with no in-app purchases.
Is Project Monarch Science free?
Project Monarch Science is free to download, with no in-app purchases.
Which has better reviews, EDDMapS or Project Monarch Science?
EDDMapS is rated higher. EDDMapS averages 4.7 out of 5 from 120 ratings, while Project Monarch Science averages 3.7 from 18 ratings.
Do EDDMapS or Project Monarch Science have ads?
Neither EDDMapS nor Project Monarch Science shows ads.
Which is updated more often, EDDMapS or Project Monarch Science?
EDDMapS ships an update monthly, and Project Monarch Science weekly. Most recently, EDDMapS was updated on September 25, 2026 and Project Monarch Science on September 21, 2026.

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