SODMAP Mobile vs Project Monarch Science
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
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.
- Crowdsourced tracking network
- Monarch butterfly migration monitoring
- Detailed movement data
- Habitat conservation insights
- Utilizes Bluetooth frequency
- Citizen science participation
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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
Verdict
The clearest difference is update cadence: Project Monarch Science at every 9 days against SODMAP Mobile's every 4 months. Project Monarch Science also leads on ratings volume (24 vs 3). SODMAP Mobile's advantage is iOS requirement (6.0 vs 15.0). On price, rating, review sentiment and ads 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.
On the App Store both sit at effectively the same score — 4.0 for SODMAP Mobile against 4.0 for Project Monarch Science. That said, the two scores are not equally well evidenced: Project Monarch Science has 24 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 50% of SODMAP Mobile's written reviews are positive against 57% of Project Monarch Science's.
SODMAP Mobile ships an update every 4 months, Project Monarch Science every 9 days. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.
| Parameter | SODMAP Mobile | Project Monarch Science |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (3 ratings) | 4.0 (24 ratings) |
| Positive reviews | 50.0% of reviews | 57.1% of reviews — better |
| Number of ratings | 3 | 24 — better |
| Update frequency | Every 4 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 6.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 83 MB |
| Age rating | 4+ | 4+ |
| Developer | Doug Schmidt | Cellular Tracking Technologies |
Customer experience
SODMAP Mobile
Project Monarch Science
In-app purchases
SODMAP Mobile
No in-app purchases
Project Monarch Science
No in-app purchases
Questions
Is SODMAP Mobile free?
Is Project Monarch Science free?
Which has better reviews, SODMAP Mobile or Project Monarch Science?
Do SODMAP Mobile or Project Monarch Science have ads?
Which is updated more often, SODMAP Mobile or Project Monarch Science?
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