# Project Monarch Science vs AcuRite NOW

The clearest difference is review sentiment: Project Monarch Science at 60% against AcuRite NOW's 2%. Project Monarch Science also leads on rating (4.0 vs 1.1) and update cadence (every 10 days vs every 5 weeks). AcuRite NOW's advantage is ratings volume (1.1K vs 27) and iOS requirement (13.0 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 1.1. That said, the two scores are not equally well evidenced: AcuRite NOW has 1.1K ratings behind it against 27, so its average is the more settled of the two. Written reviews point the same way: 60% of Project Monarch Science's written reviews are positive against 2% of AcuRite NOW's.

Project Monarch Science ships an update every 10 days, AcuRite NOW every 5 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Project Monarch Science | AcuRite NOW |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (27 ratings)](https://appshunter.io/ios/app/project-monarch-science/id6460006970/reviews)** | [1.1 (1.1K ratings)](https://appshunter.io/ios/app/acurite-now/id6744401736/reviews) |
| Number of ratings | 27 | **1.1K** |
| Positive reviews | **60.0% of reviews** | 1.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 5 weeks |
| Monetization | Free | Free |
| Size | 83 MB | 251 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Cellular Tracking Technologies](https://appshunter.io/developer/1588087267) | [Chaney Instruments](https://appshunter.io/developer/453478248) |

## What reviewers say

### 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


### AcuRite NOW

[App page](https://appshunter.io/ios/app/acurite-now/id6744401736)

Access real-time, hyper-local weather and environmental data from your connected sensors. Get custom alerts, integrate with smart home devices, and make informed decisions for your home, garden, or outdoor adventures.

**Highlights:** Real-time weather data, Smart home integration, Customizable alerts, Multi-sensor monitoring, Visual dashboards, Historical trends, Daily & 5-day forecasts

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Project Monarch Science free?

Project Monarch Science is free to download, with no in-app purchases.

### Is AcuRite NOW free?

AcuRite NOW is free to download, with no in-app purchases.

### Which has better reviews, Project Monarch Science or AcuRite NOW?

Project Monarch Science is rated higher. Project Monarch Science averages 4.0 out of 5 from 27 ratings, while AcuRite NOW averages 1.1 from 1.1K ratings.

### Do Project Monarch Science or AcuRite NOW have ads?

Neither Project Monarch Science nor AcuRite NOW shows ads.

### Which is updated more often, Project Monarch Science or AcuRite NOW?

Project Monarch Science ships an update every 10 days, and AcuRite NOW every 5 weeks. Most recently, Project Monarch Science was updated on October 25, 2026 and AcuRite NOW on October 25, 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.*