# WARN NJDEP vs Project Monarch Science

The clearest difference is update cadence: Project Monarch Science at every 10 days against WARN NJDEP's every 25 months. Project Monarch Science also leads on rating (4.0 vs 3.7) and ratings volume (28 vs 3). WARN NJDEP's advantage is iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Project Monarch Science holds the better App Store score, 4.0 against 3.7. That said, the two scores are not equally well evidenced: Project Monarch Science has 28 ratings behind it against 3, so its average is the more settled of the two.

WARN NJDEP ships an update every 25 months, Project Monarch Science every 10 days. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | WARN NJDEP | Project Monarch Science |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/warn-njdep/id1133675885/reviews) | **[4.0 (28 ratings)](https://appshunter.io/ios/app/project-monarch-science/id6460006970/reviews)** |
| Number of ratings | 3 | **28** |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 10 days** |
| Monetization | Free | Free |
| Size | 42 MB | 83 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [New Jersey Department of Treasury](https://appshunter.io/developer/1493415951) | [Cellular Tracking Technologies](https://appshunter.io/developer/1588087267) |

## What reviewers say

### WARN NJDEP

[App page](https://appshunter.io/ios/app/warn-njdep/id1133675885)

Report environmental incidents, abuses, and complaints impacting New Jersey directly to the NJDEP. Pinpoint locations, attach photos, and easily contact the WARNDEP hotline. This app is for non-emergency reporting only.

**Highlights:** Report environmental incidents, Pinpoint incident location via GPS, Attach photos to submissions, Directly contact WARNDEP hotline, Submit information to NJDEP

**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 WARN NJDEP free?

WARN NJDEP 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, WARN NJDEP or Project Monarch Science?

Project Monarch Science is rated higher. WARN NJDEP averages 3.7 out of 5 from 3 ratings, while Project Monarch Science averages 4.0 from 28 ratings.

### Do WARN NJDEP or Project Monarch Science have ads?

Neither WARN NJDEP nor Project Monarch Science shows ads.

### Which is updated more often, WARN NJDEP or Project Monarch Science?

WARN NJDEP ships an update every 25 months, and Project Monarch Science every 10 days. Most recently, WARN NJDEP was updated on October 24, 2026 and Project Monarch Science on October 27, 2026.

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