bloomWatch vs EDDMapS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
bloomWatch
This app allows users to document and track the occurrence of freshwater algae blooms. Your submissions help scientists and public health officials monitor water quality and manage resources for recreation and potable water.
- Document algae bloom occurrences
- Track bloom location and frequency
- Contribute to water quality monitoring
- Support scientific research
- Report potentially harmful blooms
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Blooms are visibly abundant proliferations of freshwater algae and have the potential to cause risks to human and animal health. Their occurrence is presently not well documented. bloomWatch is an App that has been developed to track and document the occurrence of these potentially harmful algal blooms. Your input using this App will provide documentation as to the location and frequency of potentially harmful bloom events, helping scientists, water quality managers, and public health officials effectively track and manage the water resources that the public depends on for potable water and recreation.
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.
- Document invasive species distribution
- User-friendly mapping system
- Data submission and querying
- Interactive maps
- Expert data verification
- Early Detection and Rapid Response support
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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.
Screenshots
Verdict
The clearest difference is review sentiment: EDDMapS at 57% against bloomWatch's 0%. EDDMapS also leads on rating (4.7 vs 3.6) and update cadence (monthly vs every 4 months). bloomWatch's advantage is iOS requirement (13.0 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
EDDMapS holds the better App Store score, 4.7 against 3.6. That said, the two scores are not equally well evidenced: EDDMapS has 120 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 0% of bloomWatch's written reviews are positive against 57% of EDDMapS's.
bloomWatch ships an update every 4 months, EDDMapS monthly. The most recent releases landed on September 10, 2026 and September 25, 2026 respectively.
| Parameter | bloomWatch | EDDMapS |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (12 ratings) | 4.7 (120 ratings) — better |
| Positive reviews | 0.0% of reviews | 57.1% of reviews — better |
| Number of ratings | 12 | 120 — better |
| Update frequency | Every 4 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 216 MB | 251 MB |
| Age rating | 4+ | 4+ |
| Developer | United States Environmental Protection Agency (USEPA) | Charles T. Bargeron |
Customer experience
bloomWatch
EDDMapS
In-app purchases
bloomWatch
No in-app purchases
EDDMapS
No in-app purchases








