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Best The Reference App

247+ iOS apps curated and reviewed

4.6 avg rating
16 free apps
Updated August 2026

With an average user rating of 4.6★, the the reference app category is one of the App Store's strongest. Browse all 247+ apps we track, sorted so the most loved ones surface first.

Compare top The Reference App (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1WikipediaWikipediaFree4.3★ (6.2K)NoNoAug 2026
2Dictionary.com: English WordsDictionary.com: English WordsFree4.8★ (328K)YesNoAug 2026
3NASANASAFree4.8★ (64K)NoNoAug 2026
4World Map +World Map +Free4.7★ (8K)YesNoAug 2026
5Merlin Bird ID by Cornell LabMerlin Bird ID by Cornell LabFree4.9★ (111K)NoNoAug 2026
6Magic Poser - Art Pose ToolMagic Poser - Art Pose ToolFree3.8★ (12K)NoYesAug 2026
7Guitarist's ReferenceGuitarist's Reference$19.994.8★ (16)NoNoAug 2026
8BibleBibleFree4.9★ (14M)NoNoAug 2026

Top Picks for The Reference App

Wikipedia#1

Wikipedia by Wikimedia Foundation

The Free Encyclopedia
Editor's Choice
🔍 Reference
4.3😐(6.2K ratings)
Free
#42in Reference
Wikipedia screenshot 1
Wikipedia screenshot 2
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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
Dictionary.com: English Words#2

Dictionary.com: English Words by Curiosity Media

Dictionary, Thesaurus, Vocab
Strong Contender
🔍 Reference
4.8😐(328K ratings)
FreeAdsIn-App Purchases
Dictionary.com: English Words screenshot 1
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Dictionary.com: English Words screenshot 4
Dictionary.com: English Words screenshot 5

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.

What We Love

  • 🚀 Robust dictionary and thesaurus
  • 🤓 Helpful resources like blogs and articles
  • 💡 Useful word games and puzzles
  • 👍 Easy to use and navigate

Room to Improve

  • 🐛 Inconsistent search results and missing definitions
  • 💸 Aggressive ads even after paid upgrades
  • 🤯 Frequent crashes and performance issues
NASA#3

NASA by NASA

Worth Considering
📚 Education
4.8😊(64K ratings)
Free
NASA screenshot 1
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NASA screenshot 6

Explore the universe with access to live and on-demand NASA+ videos, a vast collection of stunning images, and the latest mission news. Discover interactive augmented reality experiences and track the International Space Station's path.

What We Love

  • 🚀 Fast loading
  • 👍 Informative and educational
  • 🌟 Amazing images and videos
  • 💻 Great for learning about space

Room to Improve

  • 🐛 Crashes and freezes
  • 🔍 Difficult to navigate and find content
  • 📺 Missing live streaming features

More The Reference App apps to explore

4
World Map +
World Map +
World Map +
Quick Reference World Maps
Free

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.

Quick access to essential world mapsPolitical, Detailed, and Time Zones MapsEasy map switching
🔍 Reference
(8K)
ad-supported
5
Merlin Bird ID by Cornell Lab
Merlin Bird ID by Cornell Lab
Merlin Bird ID by Cornell Lab
Identify Birds You See & Hear
Free

Easily identify birds by sight or sound using advanced machine learning. Explore birds in your region, track your sightings, and learn about species with photos, sounds, and range maps. This free app from the Cornell Lab of Ornithology helps build your birding skills.

Identify birds by photoIdentify birds by soundAnswer simple questions for ID
🔍 Reference
(111K)
free with in-app purchases
6
Magic Poser - Art Pose Tool
Magic Poser - Art Pose Tool
Magic Poser - Art Pose Tool
Best 3D pose reference app
Free

This app provides a 3D character posing tool for artists, allowing them to create custom scenes with realistic anatomy, lighting, and props. It offers intuitive drag-and-pose controls and extensive libraries for detailed artwork creation.

Intuitive drag-and-pose controlsRealistic 3D character modelsAdvanced physics engine for posing
🎨 Graphics & Design
(12K)
freemium
7
Guitarist's Reference
Guitarist's Reference
Guitarist's Reference
All-in-One Guitarist's Suite
$19.99

This comprehensive suite offers a vast collection of guitar chords, scales, and arpeggios with clear diagrams and detailed theory. It includes tools for finding chord-scale relationships, exploring alternate tunings, and even a virtual guitar for practice.

3000+ guitar chords with diagrams42 scale types including modes and pentatonicsArpeggio finder
🎵 Music
(16)
free
8
Bible
Bible
Bible
Daily Study, Audio & Prayer
Free

Access a vast library of Bible versions in multiple languages, listen to audio Bibles, and engage in daily study with friends. Create prayers, add notes, and customize your reading experience with themes and verse images.

3,500+ Bible versionsAudio BiblesThousands of Reading Plans
🔍 Reference
(14M)
free with in-app purchases
9
Audubon Bird Guide
Audubon Bird Guide
Audubon Bird Guide
Identify over 800 bird species
Free

Identify North American birds with this comprehensive field guide. Features include a bird ID tool based on observations, detailed species information with photos and audio, and a personal sightings log. Discover nearby birding locations and connect with conservation efforts.

Bird identification toolDetailed species profilesBird song and call audio
🔍 Reference
(4.5K)
free with in-app purchases
10
Spoken English Study
Spoken English Study
Spoken English Study
by 芬霞 方
Free
📚 Education
(0)
11
On the Shelf - Library Lookup
On the Shelf - Library Lookup
On the Shelf - Library Lookup
Library Meets Reading List
Free
📚 Books
(0)
12
Servodata Mobile App
Servodata Mobile App
Servodata Mobile App
by jc software solution
Free
🔍 Reference
(0)
13
CNWL Clinical Reference Hub
CNWL Clinical Reference Hub
CNWL Clinical Reference Hub
Right information. Right time.
Free
🏥 Medical
(0)
14
走遍法国第一册 -Reflets原版视听
走遍法国第一册 -Reflets原版视听
走遍法国第一册 -Reflets原版视听
情景交际口语
$1.99

This application is based on a popular French language learning textbook series. It uses audio-visual content and interactive teaching methods to develop listening and speaking skills, integrating language and culture. It covers pronunciation, grammar, and daily life scenarios.

Audio-visual learning contentInteractive teaching methodsPronunciation and phonetics
📚 Education
(0)
paid
15
Intersection.app
Intersection.app
Intersection.app
Meaningful Relationships
Free
💼 Business
(0)
16
高中语文必修上册人教部编版
高中语文必修上册人教部编版
高中语文必修上册人教部编版
学霸口袋学习助手
$0.99
💼 Business
(0)
17
疯狂英语900句 -基础精华珍藏版
疯狂英语900句 -基础精华珍藏版
疯狂英语900句 -基础精华珍藏版
实用口语会话流利说
$1.99

Master everyday English conversations with 900 essential sentence patterns and 3600 practical phrases. Covers daily life, school, work, and various social scenarios with vocabulary, dialogues, stories, and proverbs.

900 standard sentence patterns3600 practical daily phrasesCovers daily life, school, work, and social scenarios
📚 Education
(0)
paid
18
The Bookmark App
The Bookmark App
The Bookmark App
by James Dunn
Free
📚 Books
(0)
19
A2Z Services App
A2Z Services App
A2Z Services App
2zservices
Free
🍔 Food & Drink
(0)
20
arXiv Companion
arXiv Companion
arXiv Companion
Read arXiv preprints on the go
Free
🔍 Reference
(0)

FAQ about The Reference App

What is the best the reference app for iPhone?
Wikipedia tops our the reference app ranking as of August 2026, with a 4.3-star average from 6.2K App Store ratings, and it's free to download.
Yes — 16 of the top the reference app we rank are free to download, including Wikipedia and Dictionary.com: English Words.
Wikipedia has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 247+ the reference app 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.