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Best Reference Apps

232+ iOS apps curated and reviewed

4.7 avg rating
19 free apps
Updated June 2026

With an average user rating of 4.7★, the reference apps category is one of the App Store's strongest. Browse all 232+ apps we track, sorted so the most loved ones surface first.

Top Picks for Reference Apps

World Map +#1

World Map + by Appventions

Quick Reference World Maps
Editor's Choice
🔍 Reference
4.7😐(7.1K ratings)
FreeAds
World Map + screenshot 1
World Map + screenshot 2
World Map + screenshot 3
World Map + screenshot 4

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.

What We Love

  • 🗺️ Quick reference for travel
  • 🌍 Excellent world map resource
  • 👍 Easy to use and navigate
  • 🎓 Helpful for learning geography

Room to Improve

  • 🗺️ Lacks detailed maps and zooming capabilities
  • 🐛 Interactive map not functioning properly
  • 🗺️ Inaccurate or outdated map information
Merlin Bird ID by Cornell Lab#2

Merlin Bird ID by Cornell Lab by Cornell University

Identify Birds You See & Hear
Strong Contender
🔍 Reference
4.9😊(108K ratings)
FreeAds
#2in Reference
Merlin Bird ID by Cornell Lab screenshot 1
Merlin Bird ID by Cornell Lab screenshot 2
Merlin Bird ID by Cornell Lab screenshot 3
Merlin Bird ID by Cornell Lab screenshot 4
Merlin Bird ID by Cornell Lab screenshot 5
Merlin Bird ID by Cornell Lab screenshot 6

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.

What We Love

  • 🚀 Helpful for bird identification
  • 🔒 Accurate bird identification
  • 👍 Easy to use
  • 👍 Useful for beginners and experts

Room to Improve

  • 🐛 Sound ID not always accurate
  • 🐛 Occasional crashes or bugs
  • 🐛 Difficulty adding birds to life list
Wikipedia#3

Wikipedia by Wikimedia Foundation

The Free Encyclopedia
Worth Considering
🔍 Reference
4.3😐(6.1K ratings)
Free
#74in 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

More Reference Apps apps to explore

4
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
5
Vocabulary - Learn words daily
Vocabulary - Learn words daily
Vocabulary - Learn words daily
Erweitern Sie Ihren Wortschatz
Free

Expand your vocabulary with daily word learning and engaging games. This app offers customizable learning paths and difficulty levels to suit your English proficiency. Make vocabulary acquisition a fun and effective part of your routine.

Learn new words dailyCustomizable difficulty levelsSelect vocabulary categories
📚 Education
(205K)
free with in-app purchases
6
NASA
NASA
NASA
by NASA
Free

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.

NASA+ video streaming21,000+ NASA imagesLatest NASA news
📚 Education
(64K)
free
7
Dictionary.com: English Words
Dictionary.com: English Words
Dictionary.com: English Words
Dictionary, Thesaurus, Vocab
Free

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.

2 million+ definitions and synonymsWord of the DayExample sentences
🔍 Reference
(328K)
free with in-app purchases
8
Value Study: art reference
Value Study: art reference
Value Study: art reference
Analyze light and shadow
Free

This app helps artists improve their skills by analyzing light and shadow in reference images. It allows users to break down tones step-by-step, from simple black and white to more complex value ranges, aiding in the understanding of depth and form. It's a tool to enhance traditional art studies.

Step-by-step tone breakdownHighlighting areas of same valueFocus on light, shadow, and form
🎨 Graphics & Design
(3.2K)
free with in-app purchases
9
WordReference Dictionary
WordReference Dictionary
WordReference Dictionary
by WordReference.com, LLC
Free

Access a comprehensive suite of dictionaries and translation tools for multiple languages. Explore conjugations, synonyms, and a vast forum with millions of answered questions. This app provides quick access to extensive language resources.

Extensive multilingual dictionariesVerb conjugatorsSynonym finder
🔍 Reference
(5)
ad-supported
10
Medical Dictionary by Farlex
Medical Dictionary by Farlex
Medical Dictionary by Farlex
Healthcare Terminology
Free

Access over 180,000 medical terms with clear definitions, audio pronunciations, and images from authoritative sources. This free app is ideal for healthcare professionals, students, and anyone curious about medical terminology, offering offline access to a vast glossary.

180,000+ medical terms and definitionsOffline access to 40,000+ entriesThousands of medical abbreviations
🏥 Medical
(6.5K)
free with in-app purchases
11
Planta: Plant & Garden Care
Planta: Plant & Garden Care
Planta: Plant & Garden Care
Happy Life, Happy Plants!
Free

Identify plants with a photo, receive personalized care schedules, and get help diagnosing plant problems. Track your plant's progress and learn from a community of plant lovers.

AI plant identificationPersonalized care schedulesPlant problem diagnosis
🌟 Lifestyle
(111K)
subscription
12
Word Hippo
Word Hippo
Word Hippo
Thesaurus and Word Reference
Free

This app offers a comprehensive suite of word tools, including an advanced thesaurus for synonyms and antonyms, example sentences, rhyming words, and word type identification. It also features word finders for games, definitions, and translations into numerous languages.

Advanced thesaurus with synonyms and antonymsExample sentences for word usageRhyming word finder
🔍 Reference
(12K)
free with in-app purchases
13
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
14
Oxford Dictionary & Thesaurus
Oxford Dictionary & Thesaurus
Oxford Dictionary & Thesaurus
Thesaurus & Offline Vocabulary
Free

Access a vast collection of dictionaries and thesauruses with definitions, pronunciations, and etymology. Features include offline access, advanced search options, and personalized word lists. Ideal for students, professionals, and word enthusiasts.

15 Oxford DictionariesThesaurus integrationAudio pronunciations
🔍 Reference
(28K)
free with in-app purchases
15
Facts - Daily Random Trivia
Facts - Daily Random Trivia
Facts - Daily Random Trivia
Learn new interesting things
Free

Expand your knowledge with daily random trivia and interesting facts across various categories. Amaze others with your newfound wisdom or simply enjoy learning something new each day. Explore thousands of facts and customize your learning experience.

Daily random factsThousands of factsCategorized facts
🔍 Reference
(64K)
free with in-app purchases
16
Police Scanner Radio & Fire
Police Scanner Radio & Fire
Police Scanner Radio & Fire
Live Breaking News & Alerts
Free

Listen to live police, fire, and emergency radio broadcasts from around the world. Receive breaking news alerts and stay informed about local events and major national incidents in real time.

Live police and fire scanner broadcastsBreaking news alertsLocal and national event updates
📡 News
(523K)
free with in-app purchases
17
Brilliant: Learn Math & Coding
Brilliant: Learn Math & Coding
Brilliant: Learn Math & Coding
Your personal tutor
Free

Master math and computer science through interactive, visual lessons. This app focuses on active problem-solving and personalized practice to build critical thinking and STEM skills. Ideal for students and lifelong learners seeking to deepen their understanding and confidence.

Interactive problem-solving lessonsPersonalized practice setsVisual explanations of concepts
📚 Education
(30K)
free with in-app purchases
18
Handy Art Reference Tool
Handy Art Reference Tool
Handy Art Reference Tool
3D Lit Reference for Artists!
$1.99

This app provides artists with rotatable 3D models of hands, heads, and feet for drawing reference. Customize poses and lighting to achieve realistic results for your artwork. Additional packs for animal skulls and foot rigs are available for purchase.

Rotatable 3D limb modelsCustomizable posesAdjustable 3-point lighting
📚 Education
(1.2K)
free with in-app purchases
19
Essayist: Academic Writing App
Essayist: Academic Writing App
Essayist: Academic Writing App
APA, MLA, Chicago & More
Free

This app simplifies academic writing by automatically formatting essays in various styles like APA, MLA, and Chicago. It includes a universal reference manager, citation tools, and equation support, allowing for distraction-free writing and easy export to PDF or Word.

Automatic essay formattingUniversal reference managerIn-text citation and footnote insertion
📊 Productivity
(378)
subscription
20
Curio - Antique Identifier
Curio - Antique Identifier
Curio - Antique Identifier
Antiques Appraiser by Picture
Free

Identify, understand, and value your antiques with just a photo. Get instant identification, historical context, and estimated market value for your treasures. Organize your collection and explore similar items online.

Instant antique identification by photoDetailed historical context and originEstimated market value appraisals
🔍 Reference
(13K)
free with in-app purchases

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