Comparison

Caterpillar Identifier vs Project Monarch Science

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

Head to head
About

Caterpillar Identifier

Instantly identify caterpillars from photos with high accuracy using a large database. Subscribe for full access to this identification tool. Cancel anytime.

Highlights
  • Instant photo processing
  • High accuracy identification
  • Extensive caterpillar database
  • Subscription for full access
  • Cancel anytime subscription
Features
Read full description

Do you want to identify any caterpillar by photo? Our app is what you need! - Instant processing - High accuracy - Big database Subscribe to get full access: $9.99 per month, cancel anytime Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sites.google.com/view/sashesprivacy/

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.

Screenshots

Caterpillar Identifier3 screens
Project Monarch Science4 screens

Verdict

The call

The clearest difference is review sentiment: Project Monarch Science at 60% against Caterpillar Identifier's 0%. Project Monarch Science also leads on rating (4.0 vs 2.6) and in-app purchases (none vs 1). Caterpillar Identifier's advantage is iOS requirement (13.0 vs 15.0). On price, ads 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. Caterpillar Identifier sells 1 in-app purchase, starting at $9.99 per month. Project Monarch Science asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Project Monarch Science holds the better App Store score, 4.0 against 2.6. Both are backed by a comparable volume of ratings — 9 and 28 respectively. Written reviews point the same way: 0% of Caterpillar Identifier's written reviews are positive against 60% of Project Monarch Science's.

UpkeepUpdate frequency

Caterpillar Identifier ships an update every 2 months, Project Monarch Science every 10 days. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.

Scorecard7 real differences · 3 level
Caterpillar Identifier versus Project Monarch Science: the parameters behind the verdict, then further details
ParameterCaterpillar IdentifierProject Monarch Science
PriceFreeFree
Rating2.6 (9 ratings)4.0 (28 ratings) — better
Positive reviews0.0% of reviews60.0% of reviews — better
Number of ratings928 — better
Update frequencyEvery 2 monthsEvery 10 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size7 MB83 MB
Age rating4+4+
DeveloperTolkyn RaimbayevaCellular Tracking Technologies

Customer experience

Caterpillar Identifier

All ratings8 ratings
Positive37.5%
Neutral0.0%
Negative62.5%
Written reviews5 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Project Monarch Science

All ratings27 ratings
Positive74.1%
Neutral0.0%
Negative25.9%
Written reviews15 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

In-app purchases

1 purchases

Caterpillar Identifier

Subscriptions1
  • Caterpillar ID Full Access$9.991 Month
None

Project Monarch Science

No in-app purchases

Questions

Is Caterpillar Identifier free?
Caterpillar Identifier is free to download, with in-app purchases available.
Is Project Monarch Science free?
Project Monarch Science is free to download, with no in-app purchases.
Which has better reviews, Caterpillar Identifier or Project Monarch Science?
Project Monarch Science is rated higher. Caterpillar Identifier averages 2.6 out of 5 from 9 ratings, while Project Monarch Science averages 4.0 from 28 ratings.
Do Caterpillar Identifier or Project Monarch Science have ads?
Neither Caterpillar Identifier nor Project Monarch Science shows ads.
Which is updated more often, Caterpillar Identifier or Project Monarch Science?
Caterpillar Identifier ships an update every 2 months, and Project Monarch Science every 10 days. Most recently, Caterpillar Identifier was updated on October 23, 2026 and Project Monarch Science on October 27, 2026.

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