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Best Free Encyclopedia Apps

224+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated June 2026

Whether you're new to free encyclopedia or looking for an upgrade, our curated collection of 224+ 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 (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1WikipanionWikipanionFree3.8★ (155)NoNoJul 2026
2WikipediaWikipediaFree4.3★ (6.1K)NoNoJul 2026
3Encyclopedia : 25,000+ topicEncyclopedia : 25,000+ topicFree4.3★ (57)YesNoMay 2026
4Encyclopedia by FarlexEncyclopedia by FarlexFree4.6★ (366)YesYesJul 2026
5Omnipedia—Offline EncyclopediaOmnipedia—Offline EncyclopediaFree—NoYesJul 2026
6World History EncyclopediaWorld History EncyclopediaFree4.8★ (25)YesNoJul 2026
7Merriam-Webster DictionaryMerriam-Webster DictionaryFree4.8★ (320K)YesYesJul 2026
8Encyclopedia of CatsEncyclopedia of CatsFree4.7★ (3)NoYesMay 2026

Top Picks for Free Encyclopedia

Wikipanion#1

Wikipanion by Robert Chin

Editor's Choice
🔍 Reference
3.8😊(155 ratings)
Free
Wikipanion screenshot 1
Wikipanion screenshot 2
Wikipanion screenshot 3
Wikipanion screenshot 4
Wikipanion screenshot 5

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.

What We Love

  • 🚀 Fast and responsive
  • 👍 Simple and intuitive UI
  • 📚 Excellent Wikipedia integration
  • 🔍 Helpful search and navigation features

Room to Improve

  • 🐛 Occasional crashes and performance issues
  • 🕰️ Slow loading times for some users
  • 💡 Lack of dark mode or customization options
Wikipedia#2

Wikipedia by Wikimedia Foundation

The Free Encyclopedia
Strong Contender
🔍 Reference
4.3😐(6.1K ratings)
Free
#90in Reference
Wikipedia screenshot 1
Wikipedia screenshot 2
Wikipedia screenshot 3
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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 : 25,000+ topic#3

Encyclopedia : 25,000+ topic by Anas Ziad Ali Almomany

Read, Download HD Images
Worth Considering
🔍 Reference
4.3(57 ratings)
FreeAds
Encyclopedia : 25,000+ topic screenshot 1
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Encyclopedia : 25,000+ topic screenshot 3
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Encyclopedia : 25,000+ topic screenshot 5
Encyclopedia : 25,000+ topic screenshot 6

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.

More Free Encyclopedia apps to explore

4
Encyclopedia by Farlex
Encyclopedia by Farlex
Encyclopedia by Farlex
Science, World History, & More
Free

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.

330,000+ encyclopedia articles24,000+ images77,000+ audio pronunciations
🔍 Reference
(366)
free with in-app purchases
5
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
(0)
free with in-app purchases
6
World History Encyclopedia
World History Encyclopedia
World History Encyclopedia
Learn Trusted Historical Facts
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
(25)
free
7
Merriam-Webster Dictionary
Merriam-Webster Dictionary
Merriam-Webster Dictionary
by Merriam-Webster, Inc.
Free

Access America's most respected dictionary, updated with new words and meanings. This app offers offline access, voice search, daily vocabulary challenges, and a thesaurus. It's designed for English language reference, education, and vocabulary enhancement.

Offline dictionary accessVoice search for wordsDaily Word of the Day
🔍 Reference
(320K)
free with in-app purchases
8
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
9
CHI Encyclopedia of Snakes
CHI Encyclopedia of Snakes
CHI Encyclopedia of Snakes
by Good Spider, LLC
Free

Discover a vast collection of articles and high-definition photos detailing snakes from around the world. This educational tool offers an intuitive interface, offline access, and a badge system to encourage learning about herpetology.

Extensive snake articles and HD photosSimple and intuitive user interfaceOffline access for on-the-go reading
📚 Education
(39)
free with in-app purchases
10
Catholic Encyclopedia
Catholic Encyclopedia
Catholic Encyclopedia
Knowledge in your pocket.
Free

Access a comprehensive Catholic Encyclopedia with over 16,000 articles optimized for mobile. Enjoy offline access, intuitive navigation, and powerful search capabilities to explore religious, historical, and geographical topics.

Offline access to 16,000+ articlesIntuitive user interfaceEnhanced search functionality
📚 Education
(47)
free with in-app purchases
11
CHI Encyclopedia of Weather
CHI Encyclopedia of Weather
CHI Encyclopedia of Weather
by Good Spider, LLC
Free

Explore global weather phenomena through thousands of articles and HD photos. This comprehensive guide is suitable for children learning about weather or adults seeking in-depth information. Earn badges for reading and access all content offline.

Thousands of articles and HD photosComprehensive weather informationEngaging and easy-to-understand content
📚 Education
(10)
free with in-app purchases
12
CHI Encyclopedia of the First Millennium
CHI Encyclopedia of the First Millennium
CHI Encyclopedia of the First Millennium
by Good Spider, LLC
Free

This educational app provides comprehensive historical information about the First Millennium through engaging articles and HD photos. It's designed for all ages, offering an offline experience with a badge collection system to encourage learning.

Thousands of articles and HD photosOffline accessBadge collection system
📚 Education
(6)
free
13
Encyclopedia of Animals
Encyclopedia of Animals
Encyclopedia of Animals
by Good Spider, LLC
Free

Discover a vast collection of animal information with high-definition photos and engaging articles. This educational tool is perfect for children learning about wildlife or anyone interested in expanding their animal knowledge. Enjoy offline access and earn badges for reading.

Extensive animal articles and HD photosAlphabetical organization (A-Z)User-friendly interface
📚 Education
(19)
free with in-app purchases
14
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
(12)
free with in-app purchases
15
Nabulsi Encyclopedia
Nabulsi Encyclopedia
Nabulsi Encyclopedia
of Islamic Science
Free

Explore a vast Islamic science encyclopedia with audio, video, and text lectures. Discover daily quotes, new topics, fatwas, and e-books. This comprehensive resource offers interactive content and easy navigation for in-depth learning.

Audio, video, and text lecturesInteractive main pageDaily quotes and new topics
📚 Education
(42)
free
16
Encyclopedia: Kids Learning
Encyclopedia: Kids Learning
Encyclopedia: Kids Learning
Fun STEM Topics & Quizzes
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
(2)
free
17
Encyclopedia of Boats
Encyclopedia of Boats
Encyclopedia of Boats
by Good Spider, LLC
Free

Discover a vast collection of information and high-definition images about boats, from airboats to zilles. This app offers an engaging and easy-to-understand learning experience for all ages, with offline access and collectible badges to encourage exploration.

Thousands of articles and picturesHD photosSimple organization and UI
📚 Education
(1)
free
18
CHI Encyclopedia of Plauges
CHI Encyclopedia of Plauges
CHI Encyclopedia of Plauges
by Good Spider, LLC
Free

Explore thousands of articles and HD photos about plagues from A-Z. This comprehensive encyclopedia is suitable for all ages, offering engaging and easy-to-understand information. Earn badges for reading and access all content offline.

Extensive plague articlesHigh-definition photosOffline access
📚 Education
(4)
free with in-app purchases
19
CHI Encyclopedia of Donald Trump
CHI Encyclopedia of Donald Trump
CHI Encyclopedia of Donald Trump
by Good Spider, LLC
Free

This app provides a comprehensive collection of articles and high-definition photos detailing the history and political career of Donald Trump. It features an intuitive interface, offline access, and a badge collection system to encourage reading.

Thousands of articles and picturesBeautiful HD photosSimple organization and user interface
📚 Education
(7)
free with in-app purchases
20
CHI Encyclopedia of Music
CHI Encyclopedia of Music
CHI Encyclopedia of Music
by Good Spider, LLC
Free

Discover the world's musical instruments through thousands of articles and high-definition photos. This comprehensive guide is perfect for all ages, offering engaging content and offline access. Earn badges as you learn about music and instruments from A-Z.

Thousands of articles and HD photosCovers instruments from A-ZEngaging and easy-to-understand content
📚 Education
(7)
free with in-app purchases

FAQ about Free Encyclopedia

What are the best free encyclopedia apps for iPhone?
Wikipanion tops our free encyclopedia apps ranking as of June 2026, with a 3.8-star average from 155 App Store ratings, and it's free to download.
Wikipanion has no ads and has no in-app purchases, according to its App Store listing as of June 2026.
We track 224+ free encyclopedia apps on the iOS App Store as of June 2026, ranked by rating, recency, and analysis of real user reviews.
Wikipanion is an application designed to make accessing and navigating Wikipedia content faster and easier. It offers advanced search functions, intelligent browsing features, and the ability to bookmark specific entries or sections within them.
Key features include a table of contents browser, multiple search methods with smart completion and previews, dual language support, bookmarking of individual sections, history grouped by visit date, full in-page searching, and iCloud syncing.