Comparison

Project Monarch Science vs Mahjong Card Studio

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

Mahjong Card Studio

Easily design and print custom American Mahjong cards for leagues, parties, or personal events. Choose from numerous holiday and life-milestone templates, personalize them with thematic elements, and export print-ready PDFs.

Highlights
  • Design custom American Mahjong cards
  • Print-ready PDF export
  • Holiday and life-milestone templates
  • Personalize with thematic elements
  • Trifold format for US Letter
  • Create 55-hand cards
Features
Read full description

Mahjong Card Studio Design and print your own American Mahjong card — beautifully, in minutes. Mahjong Card Studio is the simplest way to create a complete 55-hand American Mahjong card and print it as a true letter-size trifold. Whether you're running a league, hosting a themed party, or commemorating a once-in-a-lifetime moment, every card you make is yours — designed by you, printed by you, played at your table. 19 Holiday Templates, Ready to Personalize Each holiday template is a fully realized 55-hand card — complete with thematic section titles, emoji accents, a tagline, and a four-digit signature anchor that replaces the calendar year, so your card never feels dated. Christmas · New Year · Valentine's Day · St. Patrick's Day · Easter · Passover · Cinco de Mayo · Mother's Day · Father's Day · Memorial Day · Independence Day · Labor Day · Halloween · Thanksgiving · Veterans Day · Hanukkah · Lunar New Year · MLK Day · Presidents' Day 12 Life-Milestone Templates for Unforgettable Occasions The same meticulous 55-hand structure, thoughtfully themed for the moments that matter most: Weddings · Milestone Anniversaries · Engagements · Bridal Showers · Bachelorette & Bachelor Parties · Baby Showers · Milestone Birthdays · Graduations · Promotions · Retirements · Housewarmings · Health & Recovery Open any template, refine it to match the guest of honor, and print enough for every player at the table. Print-Ready, Every Time Export to a polished PDF formatted for US Letter, landscape, trifold — the exact format Mahjong players have been folding for decades. Print at home, or send the file to your local print shop. What you see in the editor is precisely what arrives in your hands. Made For- -League directors crafting custom cards for tournaments and special events -Hosts planning a Mahjong-themed wedding, shower, birthday, or holiday gathering -Instructors and clubs designing tailored practice cards for students -Players who want the joy of a card built entirely their way Design it. Print it. Play it. Mahjong Card Studio turns the card you've always imagined into the card on your table. Terms of Service https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Project Monarch Science4 screens
Mahjong Card Studio3 screens

Verdict

The call

The clearest difference is review sentiment: Mahjong Card Studio at 100% against Project Monarch Science's 60%. Mahjong Card Studio also leads on rating (4.3 vs 4.0) and update cadence (every 3 days vs every 10 days). Project Monarch Science's advantage is in-app purchases (none vs 3) and ratings volume (29 vs 6). On price, ads, device support and iOS requirement 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. Mahjong Card Studio sells 3 in-app purchases, starting at $1.99 per month. Project Monarch Science asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Mahjong Card Studio holds the better App Store score, 4.3 against 4.0. Both are backed by a comparable volume of ratings — 29 and 6 respectively. Written reviews point the same way: 60% of Project Monarch Science's written reviews are positive against 100% of Mahjong Card Studio's.

UpkeepUpdate frequency

Project Monarch Science ships an update every 10 days, Mahjong Card Studio every 3 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard6 real differences · 4 level
Project Monarch Science versus Mahjong Card Studio: the parameters behind the verdict, then further details
ParameterProject Monarch ScienceMahjong Card Studio
PriceFreeFree
Rating4.0 (29 ratings)4.3 (6 ratings) — better
Positive reviews60.0% of reviews100.0% of reviews — better
Number of ratings29 — better6
Update frequencyEvery 10 daysEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.6
Further details — not scored
Size83 MB86 MB
Age rating4+4+
DeveloperCellular Tracking TechnologiesLores Logic LLC

Customer experience

Project Monarch Science

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

Mahjong Card Studio

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Project Monarch Science

No in-app purchases

3 purchases

Mahjong Card Studio

Subscriptions2
  • Mahjong Card Studio Monthly$1.991 Month
  • Mahjong Card Studio Yearly$5.991 Year
One-time1
  • Mahjong Card Studio Print$0.99

Questions

Is Project Monarch Science free?
Project Monarch Science is free to download, with no in-app purchases.
Is Mahjong Card Studio free?
Mahjong Card Studio is free to download, with in-app purchases available.
Which has better reviews, Project Monarch Science or Mahjong Card Studio?
Mahjong Card Studio is rated higher. Project Monarch Science averages 4.0 out of 5 from 29 ratings, while Mahjong Card Studio averages 4.3 from 6 ratings.
Do Project Monarch Science or Mahjong Card Studio have ads?
Neither Project Monarch Science nor Mahjong Card Studio shows ads.
Which is updated more often, Project Monarch Science or Mahjong Card Studio?
Project Monarch Science ships an update every 10 days, and Mahjong Card Studio every 3 days. Most recently, Project Monarch Science was updated on November 3, 2026 and Mahjong Card Studio on November 5, 2026.

Other comparisons