Best Citizen Science Apps

250+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated September 2026

From beginner-friendly picks to power-user tools, our citizen science list covers 250+ iPhone apps updated through September 2026. Compare ratings, prices, and screenshots in one place.

Compare top Citizen Science Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Citizen ScienceCitizen ScienceFreeNoNoAug 2026
2iNaturalistiNaturalistFree4.1★ (664)NoNoSep 2026
3iNaturalist ClassiciNaturalist ClassicFree4.6★ (4.7K)NoNoSep 2026
4B4P: Citizen ScienceB4P: Citizen ScienceFreeNoNoJun 2026
5Build4People: Citizen ScienceBuild4People: Citizen ScienceFreeNoMay 2026
6Anecdata.orgAnecdata.orgFree5.0★ (4)NoNoJul 2026
7SC Aquarium Citizen ScienceSC Aquarium Citizen ScienceFree5.0★ (7)NoNoJul 2026
8ZooniverseZooniverseFree3.7★ (36)NoNoJul 2026

Top Picks for Citizen Science

iNaturalist#2

iNaturalist by iNaturalist

Discover nature around you
Strong Contender
📚 Education
4.1😐(664 ratings)
Free
#53in Education
iNaturalist screenshot 1
iNaturalist screenshot 2
iNaturalist screenshot 3
iNaturalist screenshot 4
iNaturalist screenshot 5
iNaturalist screenshot 6

Identify plants, animals, and fungi using your camera or imported photos. Get AI-powered species suggestions and connect with a global community of nature enthusiasts to learn more about the natural world and contribute to scientific conservation efforts.

What We Love

  • 🚀 Faster and more intuitive UI
  • 👍 Improved features from website
  • 💡 Batch upload and sorting options
  • 🚀 Responsive and smooth performance
  • 👍 Easier to navigate and use
  • 👍 Ability to save and come back to observations

Room to Improve

  • 🐛 Bugs with observation time and location
  • 🔍 Difficulty finding advanced editing options
  • 🔍 Overly complex UI for basic tasks
  • 🔍 Removal of useful features like map view
  • 🔍 Too much reliance on AI identification
iNaturalist Classic#3

iNaturalist Classic by iNaturalist

Connect with Nature
Worth Considering
📚 Education
4.6😊(4.7K ratings)
Free
iNaturalist Classic screenshot 1
iNaturalist Classic screenshot 2

Record and identify species encounters with a simple interface. Contribute to scientific research and learn about biodiversity. Connect with other nature enthusiasts and explore the natural world.

What We Love

  • 👍 Helpful for identifying plants, animals, and fungi
  • 🤝 Supportive community of experts
  • 🌱 Contributes to citizen science and research
  • 🔍 Accurate identification suggestions
  • 🌐 Works well globally
  • 📚 Expands knowledge of local biodiversity

Room to Improve

  • 🐛 Occasional crashes or bugs
  • 🔍 Difficulty finding/sorting observations
  • 🔒 Privacy concerns around data sharing
  • 🤖 Concerns about AI/ML identification accuracy
  • 💬 Negative interactions with some community members

More Citizen Science apps to explore

FAQ about Citizen Science

Are there free citizen science apps for iPhone?
Yes — 20 of the top citizen science apps we rank are free to download, including Citizen Science and iNaturalist.
Citizen Science has no ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 250+ citizen science apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
Citizen Science allows members of the public to contribute valuable data to important scientific research projects. This data can be used by professional and amateur researchers for various scientific endeavors, expanding the scope and reach of research.
The app offers a variety of surveys, some of which are seasonal like snow depth or storm assessment, while others are available year-round. This variety ensures ongoing opportunities for users to participate in different types of scientific observation.

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