Comparison

Project Monarch Science vs Modus Rover

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Crowdsourced tracking network
  • Monarch butterfly migration monitoring
  • Detailed movement data
  • Habitat conservation insights
  • Utilizes Bluetooth frequency
  • Citizen science participation
Features
Read full description

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.

About

Modus Rover

Features
Read full description

Designed for ease of use, Modus Rover helps election teams maintain smooth operations and resolve problems quickly.

Screenshots

Project Monarch Science4 screens
Modus Rover3 screens

Verdict

The call

The clearest difference is update cadence: Project Monarch Science at weekly against Modus Rover's every 3 weeks. On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Project Monarch Science ships an update weekly, Modus Rover every 3 weeks. The most recent releases landed on September 21, 2026 and September 14, 2026 respectively.

Scorecard1 real difference · 9 level
Project Monarch Science versus Modus Rover: the parameters behind the verdict, then further details
ParameterProject Monarch ScienceModus Rover
PriceFreeFree
Rating3.7 (18 ratings) — better—
Positive reviews45.5% of reviews—
Number of ratings18 — better—
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size83 MB169 MB
Age rating4+4+
DeveloperCellular Tracking TechnologiesInTech Software Solutions Inc

In-app purchases

None

Project Monarch Science

No in-app purchases

None

Modus Rover

No in-app purchases

Questions

Is Project Monarch Science free?
Project Monarch Science is free to download, with no in-app purchases.
Is Modus Rover free?
Modus Rover is free to download, with no in-app purchases.
Do Project Monarch Science or Modus Rover have ads?
Neither Project Monarch Science nor Modus Rover shows ads.
Which is updated more often, Project Monarch Science or Modus Rover?
Project Monarch Science ships an update weekly, and Modus Rover every 3 weeks. Most recently, Project Monarch Science was updated on September 21, 2026 and Modus Rover on September 14, 2026.

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