241+ iOS apps curated and reviewed
The best encyclopedia apps on iPhone average 4.6★ across 241+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.6★ (401) | Yes | Yes | Aug 2026 |
| 2 |  | Free | 4.8★ (324K) | Yes | Yes | Aug 2026 |
| 3 |  | Free | 4.3★ (6.2K) | No | No | Aug 2026 |
| 4 |  | Free | 4.9★ (27) | Yes | No | Aug 2026 |
| 5 |  | Free | 4.0★ (66) | Yes | No | Aug 2026 |
| 6 |  | Free | 4.8★ (328K) | Yes | No | Aug 2026 |
| 7 |  | Free | — | No | Yes | Aug 2026 |
| 8 |  | Free | 4.7★ (8K) | Yes | No | Aug 2026 |
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.
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.
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.
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.
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.
Access over 2 million trusted definitions and synonyms for English words. Enhance your vocabulary with daily new words, example sentences, and audio pronunciations. This app provides grammar tips and editorial content to deepen your understanding of the English language.
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.
Access essential world maps for quick reference and navigation. Explore political, detailed, and time zone maps, with interesting facts about countries. Works online and offline, ideal for students, travelers, and curious minds.
Explore the world with high-resolution satellite imagery and 3D terrain. Dive into streets with Street View and create collaborative, data-driven maps from anywhere.
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.
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.
Access the Holy Quran, Islamic audio lessons, and essential worship tools like prayer times and Qibla. Resume listening where you left off and track completed content. New content is added automatically without app updates.
Explore natural remedies and nutritional advice for various health conditions. Discover beneficial foods, herbs, and supplements to support your well-being. Learn about essential nutrients and their therapeutic effects on the body.
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.