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Best Sign School Dictionary Apps

187+ iOS apps curated and reviewed

4.3 avg rating
17 free apps
Updated June 2026

Out of 187+ sign school dictionary apps on iOS, 17 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Top Picks for Sign School Dictionary

SignSchool#1

SignSchool by SignSchool Technologies LLC

Learn American Sign Language
Editor's Choice
📚 Education
4.7😊(104 ratings)
Free
SignSchool screenshot 1
SignSchool screenshot 2
SignSchool screenshot 3
SignSchool screenshot 4
SignSchool screenshot 5

Learn American Sign Language at your own pace with this app. It offers a dictionary of thousands of signs, categorized lessons, and a slow-motion feature for detailed viewing. Practice your skills with a daily sign and a fingerspelling game.

What We Love

  • 🚀 Great app, very helpful
  • 👍 Love the app, easy to use
  • 💡 Lots of vocabulary and topics
  • 👍 Good for beginners and refreshers

Room to Improve

  • 🐛 Blank topics page, some features not working
  • 🐛 Videos load slowly, hard to see signs
  • 🐛 Missing common words in dictionary
ASL Sign Language Pocket Sign#2

ASL Sign Language Pocket Sign by Trent Ewald

Video ASL lessons learn fast!
Strong Contender
📚 Education
4.8😊(33K ratings)
FreeIn-App Purchases
ASL Sign Language Pocket Sign screenshot 1
ASL Sign Language Pocket Sign screenshot 2
ASL Sign Language Pocket Sign screenshot 3
ASL Sign Language Pocket Sign screenshot 4
ASL Sign Language Pocket Sign screenshot 5

Master American Sign Language with interactive video lessons. Learn the alphabet, common phrases, and baby sign language through engaging questions and a comprehensive dictionary. Connect with your community and expand your communication skills.

What We Love

  • 👍 Easy to learn
  • 🚀 Quick lessons
  • 💡 Helpful dictionary
  • 👍 Fun and engaging

Room to Improve

  • 🐛 Incorrect signs in some lessons
  • 🐛 Flashcard answers always 'yes'
  • 💰 Limited free content, need to pay for more
ASL Bloom - Sign Language#3

ASL Bloom - Sign Language by SignLab AS

Learn, Grammar & Dictionary
Worth Considering
📚 Education
4.9😊(31K ratings)
FreeAdsIn-App Purchases
#72in Education
ASL Bloom - Sign Language screenshot 1
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Master American Sign Language with a comprehensive curriculum featuring over 120 video lessons and 1300 signs. Engage with interactive tools, grammar insights, and AI-driven learning to build confidence and fluency.

What We Love

  • 👍 Easy to learn and use
  • 🚀 Efficient learning process
  • 💡 Diverse instructors and signing styles
  • 👍 Helpful video examples and breakdowns

Room to Improve

  • 💰 Subscription required for full access
  • 🐛 Inconsistent sign representations
  • 🐛 Glitches and bugs in the app

More Sign School Dictionary apps to explore

4
Lingvano - Learn Sign Language
Lingvano - Learn Sign Language
Lingvano - Learn Sign Language
Beginner-friendly ASL lessons
Free

Learn American Sign Language with bite-sized video lessons from Deaf teachers. Practice vocabulary, grammar, and conversations with interactive tools and earn rewards. Become conversational in just 10 minutes a day.

Bite-sized video lessons600+ lessons on vocabulary and grammarInteractive practice tools
📚 Education
(111K)
freemium
5
Intersign ASL - Sign Language
Intersign ASL - Sign Language
Intersign ASL - Sign Language
Learn ASL while you have fun!
Free

Learn American Sign Language (ASL) through expert-led lessons and interactive games. This app offers over 370 lessons across 17 themed sections, adapting to your learning pace. It includes a built-in dictionary and rewards to keep you motivated.

Expert-led ASL instruction370+ lessons in 17 themesStep-by-step learning
📚 Education
(4.6K)
free with in-app purchases
6
ASL Sign Language | Aslingo
ASL Sign Language | Aslingo
ASL Sign Language | Aslingo
Learn Video Lesson, Dictionary
Free

Learn American Sign Language with interactive lessons and a comprehensive dictionary. This app offers personalized learning plans, vocabulary trainers, and practice quizzes to enhance fluency. Accessible anytime, anywhere, it's designed for all levels of learners.

Personalized learning plansInteractive bite-sized lessonsComprehensive ASL curriculum
📚 Education
(1.4K)
free with in-app purchases
7
ASL: Sign Language Lessons.
ASL: Sign Language Lessons.
ASL: Sign Language Lessons.
Hand Talk Learning, Dictionary
Free

Learn American Sign Language with interactive lessons, a comprehensive dictionary, and a text-to-sign translator. Develop fingerspelling, vocabulary, and grammar skills through engaging exercises and visual aids.

Interactive tutorialsExtensive dictionaryText-to-sign translator
🔧 Utilities
(7)
subscription
8
Hand Talk: Learn Sign Language
Hand Talk: Learn Sign Language
Hand Talk: Learn Sign Language
Translate and learn ASL
Free
$9.99 | 100% OFF

Learn and practice American, Brazilian, and British Sign Language with virtual translators. Translate text or voice into signs, access a dictionary of thousands of signs, and practice through interactive characters. Offers offline access and customizable features.

Text and voice translation to sign languageLearn ASL, Libras, and BSLVirtual translators Hugo and Maya
📚 Education
(2.1K)
free with in-app purchases
9
WordWeb Dictionary
WordWeb Dictionary
WordWeb Dictionary
Offline ad-free dictionary
Free

This app provides a comprehensive offline English dictionary and thesaurus with fast searching, spelling suggestions, definitions, and usage examples. It offers extensive word data and advanced search filters without requiring an internet connection.

Offline dictionary and thesaurusFast searchingSpelling suggestions
🔍 Reference
(85)
free
10
ASL Dictionary
ASL Dictionary
ASL Dictionary
American Sign Language
$4.99

This app provides a comprehensive video dictionary for American Sign Language, featuring over 5,200 signed words, phrases, and idioms. It allows users to translate English into ASL, covering the alphabet, numbers, and common expressions. The educational tool is designed for learning sign language through visual instruction.

Over 5,200 signed wordsEnglish to ASL translationAlphabet and numerical system
📚 Education
(1.3K)
paid
11
Anna : Sign Language - ASL
Anna : Sign Language - ASL
Anna : Sign Language - ASL
Learn Sign Language in 30 days
Free

Master American Sign Language with structured lessons and a comprehensive dictionary. Track your progress with skill assessments and learn at your own pace. Designed for beginners and those looking to improve their ASL skills.

Structured ASL lessonsComprehensive sign language dictionarySkill assessments and progress tracking
📚 Education
(1.1K)
free with in-app purchases
12
American Heritage® Dictionary
American Heritage® Dictionary
American Heritage® Dictionary
UniDict® - 4th Edition (AHD4)
$12.99

Access a comprehensive digital dictionary with nearly 300,000 terms and thousands of sound files. Features include advanced search, etymology, and AI-powered tools for deeper understanding and language learning.

Full dictionary text33,000+ example sentences64,000+ recorded sound files
🔍 Reference
(189)
free with in-app purchases
13
ASL American Sign Language App
ASL American Sign Language App
ASL American Sign Language App
Learning Dictionary Deaf Signs
Free

Learn American Sign Language with expert-led video lessons and interactive quizzes. Master conversational phrases, the alphabet, and signs for various topics like family, feelings, and daily life. This app provides a comprehensive and enjoyable learning experience for all ages.

Expert-led video lessonsFingerspelling alphabetConversational ASL phrases
📚 Education
(31)
free with in-app purchases
14
NZSL Dictionary
NZSL Dictionary
NZSL Dictionary
by David McKee
Free

Access a comprehensive dictionary of New Zealand Sign Language with diagrams and videos for thousands of words and phrases. Learn a new sign daily with the "Word of the Day" feature. Diagrams are available offline, while videos require an internet connection.

Over 4,000 NZSL signsDiagrams and videosOffline diagram access
🔍 Reference
(8)
free
15
ASL Otty: Signs Language Learn
ASL Otty: Signs Language Learn
ASL Otty: Signs Language Learn
Sign Learning, Talk Dictionary
Free

Learn American Sign Language (ASL) through engaging, game-inspired lessons and interactive exercises. An AI trainer provides real-time feedback on your gestures via camera, while a community feature allows practice and progress tracking. Start communicating barrier-free today.

Game-inspired learning approachShort, effective lessonsInteractive exercises with native speaker videos
📚 Education
(974)
free with in-app purchases
16
ASL: American Sign Language
ASL: American Sign Language
ASL: American Sign Language
American Sign Language Learn
Free

Learn American and British Sign Language with this comprehensive app. It features a vast collection of signs with clear images, organized into logical sections from basic alphabets to complex sentence formations. Discover the history and facts about sign language, with an option to upgrade to an ad-free experience.

Extensive sign library with clear imagesOrganized lessons: alphabets, numbers, greetings, and moreIncludes British Sign Language (BSL) content
📚 Education
(38)
free with in-app purchases
17
Baby Sign Dictionary - Lite
Baby Sign Dictionary - Lite
Baby Sign Dictionary - Lite
American Sign Language
Free

Teach your baby to communicate before they can speak using American Sign Language. This app offers video demonstrations, categorized signs, and interactive quizzes to make learning fun and easy for both parent and child.

40 real-life signing video demonstrationsSigns organized by categoriesInteractive video quiz
📚 Education
(228)
freemium
18
Sign ASL
Sign ASL
Sign ASL
ASL Sign Dictionary
Free

Access a comprehensive ASL sign dictionary with thousands of words and phrases. This app provides easy access to over 20,000 video demonstrations of American Sign Language signs directly on your mobile device.

Searchable ASL dictionaryThousands of words and phrasesOver 20,000 video demonstrations
📚 Education
(83)
ad-supported
19
Sign 4 Me
Sign 4 Me
Sign 4 Me
A Signed English Translator
$9.99

Learn sign language with a 3D animated character that can be manipulated for optimal viewing. Access a library of over 13,000 words and phrases, with options to control playback speed and looping. This tool is designed for beginners and aims to improve communication between hearing and Deaf communities.

3D animated sign language instructionZoom, rotate, and pan characterLibrary of over 13,000 words
🔍 Reference
(24)
paid
20
ASL Study
ASL Study
ASL Study
Learn ASL on the go!
Free

Learn American Sign Language with a comprehensive app designed for easy interaction and connection. It offers a vast vocabulary and sentence library, covering daily life, emotions, and specific topics like sports and travel. Test your knowledge with quizzes and bookmark favorite signs for quick reference.

Extensive vocabulary and sentence libraryBookmark favorite signsCovers daily life topics
📚 Education
(198)
free with in-app purchases