# SODMAP Mobile vs Project Monarch Science

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.

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.

## The numbers

| Metric | SODMAP Mobile | Project Monarch Science |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/sodmap-mobile/id633908364/reviews) | [4.0 (24 ratings)](https://appshunter.io/ios/app/project-monarch-science/id6460006970/reviews) |
| Number of ratings | 3 | **24** |
| Positive reviews | 50.0% of reviews | **57.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Free | Free |
| Size | 1 MB | 83 MB |
| Requires iOS | **6.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Doug Schmidt](https://appshunter.io/developer/633908367) | [Cellular Tracking Technologies](https://appshunter.io/developer/1588087267) |

## What reviewers say

### SODMAP Mobile

[App page](https://appshunter.io/ios/app/sodmap-mobile/id633908364)

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:** macOS Compatibility

**In-app purchases:** none


### Project Monarch Science

[App page](https://appshunter.io/ios/app/project-monarch-science/id6460006970)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SODMAP Mobile free?

SODMAP Mobile 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, SODMAP Mobile or Project Monarch Science?

SODMAP Mobile and Project Monarch Science are both rated 4.0 out of 5 on the App Store, from 3 and 24 ratings respectively.

### Do SODMAP Mobile or Project Monarch Science have ads?

Neither SODMAP Mobile nor Project Monarch Science shows ads.

### Which is updated more often, SODMAP Mobile or Project Monarch Science?

SODMAP Mobile ships an update every 4 months, and Project Monarch Science every 9 days. Most recently, SODMAP Mobile was updated on October 3, 2026 and Project Monarch Science on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*