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Best Free Encyclopedia Apps

246+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated August 2026

Whether you're new to free encyclopedia or looking for an upgrade, our curated collection of 246+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top Free Encyclopedia Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1WikipediaWikipediaFree4.3★ (6.2K)NoNoAug 2026
2Encyclopedia by FarlexEncyclopedia by FarlexFree4.6★ (401)YesYesAug 2026
3Kids Encyclopedia with AIKids Encyclopedia with AIFree—NoYesMay 2026
4The Animal EncyclopediaThe Animal EncyclopediaFree4.9★ (13)NoYesAug 2026
5WikipanionWikipanionFree3.8★ (169)NoNoAug 2026
6Encyclopedia : 25,000+ topicEncyclopedia : 25,000+ topicFree4.0★ (66)YesNoAug 2026
7Encyclopedia of CatsEncyclopedia of CatsFree4.7★ (3)NoYesMay 2026
8World History EncyclopediaWorld History EncyclopediaFree4.9★ (27)YesNoAug 2026

Top Picks for Free Encyclopedia

Wikipedia#1

Wikipedia by Wikimedia Foundation

The Free Encyclopedia
Editor's Choice
🔍 Reference
4.3😐(6.2K ratings)
Free
#72in Reference
Wikipedia screenshot 1
Wikipedia screenshot 2
Wikipedia screenshot 3
Wikipedia screenshot 4
Wikipedia screenshot 5
Wikipedia screenshot 6

Access the world's largest free knowledge base with over 60 million articles in nearly 300 languages. Explore trending topics, save articles for offline reading, and customize your reading experience with various themes and text sizes. Contribute to the community by editing articles and participating in discussions.

What We Love

  • 🚀 Vast information repository
  • 👍 Customizable reading experience
  • 🚀 Convenient offline access
  • 👍 Reliable and trustworthy content

Room to Improve

  • 🐛 Occasional crashes and freezes
  • 🔋 High data usage and battery drain
  • 🔒 Concerns about political bias and censorship
Encyclopedia by Farlex#2

Encyclopedia by Farlex by Farlex, Inc.

Science, World History, & More
Strong Contender
🔍 Reference
4.6😊(401 ratings)
FreeAdsIn-App Purchases
Encyclopedia by Farlex screenshot 1
Encyclopedia by Farlex screenshot 2
Encyclopedia by Farlex screenshot 3
Encyclopedia by Farlex screenshot 4
Encyclopedia by Farlex screenshot 5

Access over 330,000 articles, 77,000 audio pronunciations, and 24,000 images from trusted sources. This app provides in-depth information on a vast range of topics, perfect for students, professionals, or the curious.

What We Love

  • 👍 Easy to use and navigate
  • 📚 Comprehensive knowledge base
  • 🚀 Fast and efficient search
  • 💰 Free or affordable access

Room to Improve

  • 🐛 Internet connectivity issues
  • 📤 Opens search results in browser instead of app
  • 📺 Too many advertisements
Kids Encyclopedia with AI#3

Kids Encyclopedia with AI by Jan Jaso

Featuring Professor Squeaky AI
Worth Considering
📚 Education
0.0(0 ratings)
FreeIn-App Purchases
Kids Encyclopedia with AI screenshot 1
Kids Encyclopedia with AI screenshot 2
Kids Encyclopedia with AI screenshot 3
Kids Encyclopedia with AI screenshot 4
Kids Encyclopedia with AI screenshot 5
Kids Encyclopedia with AI screenshot 6

Explore a vast encyclopedia covering science, history, nature, geography, art, and technology. Engaging animated images and information make learning fun for children. New topics are consistently added to expand the knowledge base.

More Free Encyclopedia apps to explore

4
The Animal Encyclopedia
The Animal Encyclopedia
The Animal Encyclopedia
Video & Quiz Kids Game 6–12
Free

Explore wildlife through engaging videos and interactive quizzes. Learn about over 100 animals, their unique traits, and habitats. Progress through levels and tests to become an animal expert.

Over 100 animals to discoverHigh-quality animal videosEducational animal cards
📚 Education
(13)
free with in-app purchases
5
Wikipanion
Wikipanion
Wikipanion
by Robert Chin
Free

This app provides a streamlined and efficient way to access and navigate Wikipedia content. It offers advanced search capabilities, bookmarking of specific sections, and a history feature grouped by visit date. Enjoy features like a table of contents browser, dual language support, and image saving.

Smart search with entry previewBookmark individual sectionsHistory grouped by visit date
🔍 Reference
(169)
free
6
Encyclopedia : 25,000+ topic
Encyclopedia : 25,000+ topic
Encyclopedia : 25,000+ topic
Animals, Nature & Wildlife
Free

Access a vast digital encyclopedia with over 25,000 topics and articles covering nature, cities, and more. Read content or have it read aloud, and explore over 100 high-definition images per article. Discover popular places in over 1000 cities worldwide.

25,000+ topics and articles10 diverse categoriesRead-aloud functionality
🔍 Reference
(66)
ad-supported
7
Encyclopedia of Cats
Encyclopedia of Cats
Encyclopedia of Cats
by Good Spider, LLC
Free

Discover detailed articles and high-definition photos of cat breeds from A-Z. This app offers an engaging and easy-to-understand learning experience, complete with collectible badges for reading. It's perfect for both children and adults interested in feline facts, and can be accessed entirely offline.

Extensive cat breed informationHigh-definition photosOffline access
📚 Education
(3)
free with in-app purchases
8
World History Encyclopedia
World History Encyclopedia
World History Encyclopedia
Ancient Times to Modern Era
Free

Access a vast, verified library of historical articles, maps, and timelines. This non-profit resource offers academic-grade content for enthusiasts, students, and teachers, with offline access and an AI research assistant.

Verified historical accuracyGlobal perspective on historyDetailed military history accounts
🔍 Reference
(27)
free
9
Encyclopedia: Kids Learning
Encyclopedia: Kids Learning
Encyclopedia: Kids Learning
Read, listen, watch. Ages 5-12
Free

This app offers over 1,000 read-aloud topics for ages 5-12, each with a short video. It encourages reading habits with a customizable rewards system and supports multiple child profiles within a family account. Content covers STEM, history, arts, and more.

1,000+ read-aloud topicsPaired educational videosCustomizable rewards system
📚 Education
(4)
free
10
Omnipedia—Offline Encyclopedia
Omnipedia—Offline Encyclopedia
Omnipedia—Offline Encyclopedia
Offline browser for Wikipedia
Free

Access a vast offline encyclopedia, even without internet. This app provides fast, private access to millions of articles, with monthly updates and personalized recommendations. Enjoy a clean interface, customizable appearance, and on-device AI for quick answers.

Offline Wikipedia accessLightning-fast searchOn-device AI for answers
🔍 Reference
(1)
free with in-app purchases
11
WikiFM - Encyclopedia Radio
WikiFM - Encyclopedia Radio
WikiFM - Encyclopedia Radio
learn by listening
Free

This app transforms Wikipedia into an audio learning experience, allowing you to listen to articles, news, and historical events. Explore trending topics and easily navigate between related subjects for continuous knowledge discovery.

Wikipedia as audioListen to trending articlesExplore historical events
📚 Education
(8)
free
12
Malaysia History Encyclopedia
Malaysia History Encyclopedia
Malaysia History Encyclopedia
by Kartina Abdul Ghani
Free
📚 Education
(0)
13
OmniNote Personal Encyclopedia
OmniNote Personal Encyclopedia
OmniNote Personal Encyclopedia
Anything Record Notebook
Free
🔧 Utilities
(0)
14
QI Encyclopedia
QI Encyclopedia
QI Encyclopedia
PHF Quality Improvement
Free

Access a comprehensive encyclopedia of public health quality improvement resources. Features include search, filtering, a table of contents, and a glossary. All content and graphics are available offline.

Search and FilterSelectable Table of ContentsComprehensive Glossary
📚 Books
(2)
free
15
Equine Encyclopedia Of Breeds
Equine Encyclopedia Of Breeds
Equine Encyclopedia Of Breeds
The horse-lover's MUST have!
Free
$14.99 | 100% OFF

Explore a comprehensive guide to over 200 horse breeds with detailed information and stunning photos. Enhance your knowledge of equine varieties, research potential purchases, or simply impress fellow enthusiasts with your expertise.

Over 200 worldwide horse breedsDetailed breed informationHigh-quality photos
📚 Education
(1)
subscription
16
Herbs Encyclopedia
Herbs Encyclopedia
Herbs Encyclopedia
Nutrition, Benefits & more
Free
💪 Health & Fitness
(0)
17
Sprout - Plant Encyclopedia
Sprout - Plant Encyclopedia
Sprout - Plant Encyclopedia
Plant information in one place
Free
🌟 Lifestyle
(0)
18
100 Bodies: Kids Encyclopedia
100 Bodies: Kids Encyclopedia
100 Bodies: Kids Encyclopedia
100 Body Parts in 8 Languages!
Free
📚 Education
(0)
19
Quran Encyclopedia
Quran Encyclopedia
Quran Encyclopedia
by Saifullah Zia Rehmani
Free
📚 Books
(0)
20
Card Game Encyclopedia
Card Game Encyclopedia
Card Game Encyclopedia
by Randeelyn Koshman
Free
🔍 Reference
(0)

FAQ about Free Encyclopedia

What are the best free encyclopedia apps for iPhone?
Wikipedia tops our free encyclopedia apps ranking as of August 2026, with a 4.3-star average from 6.2K App Store ratings, and it's free to download.
Wikipedia has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 246+ free encyclopedia apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
This is the official application for Wikipedia, the world's largest free knowledge project. It provides access to over 60 million articles in nearly 300 languages, all ad-free and free of charge. You can use it to search for information, read articles, and even contribute to the encyclopedia.
Key features include ad-free access to a vast encyclopedia, search across 300 languages, a personalized feed for trending and breaking news, offline article saving, customizable reading themes and text sizes, map-based discovery of nearby places, and tools for contributing to Wikipedia.