Best Sign Language Dictionary Apps

248+ iOS apps curated and reviewed

4.3 avg rating
17 free apps
Updated September 2026

Finding the right sign language dictionary apps can be overwhelming with so many options. We've analyzed 248+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Sign Language Dictionary Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Sign ASLSign ASLFree4.1★ (90)YesNoSep 2026
2ASL Sign Language Pocket SignASL Sign Language Pocket SignFree4.8★ (38K)NoYesSep 2026
3SignSchoolSignSchoolFree4.5★ (136)NoNoSep 2026
4ASL Dictionary Sign LanguageASL Dictionary Sign Language$7.994.7★ (2K)NoNoSep 2026
5ASL American Sign LanguageASL American Sign LanguageFree4.5★ (3K)YesYesSep 2026
6Spread the Sign ASL DictionarySpread the Sign ASL DictionaryFree4.9★ (61)NoYesSep 2026
7Sign Language TranslatorSign Language TranslatorFree3.9★ (23)NoNoAug 2026
8Write Sign Language Dictionary - Offline AmericanSign LanguageWrite Sign Language Dictionary - Offline AmericanSign LanguageFree3.0★ (1)NoNoMay 2026

Top Picks for Sign Language Dictionary

Sign ASL#1

Sign ASL by Daniel Mitchell

ASL Sign Dictionary
Editor's Choice
📚 Education
4.1(90 ratings)
FreeAds
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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.

ASL Sign Language Pocket Sign#2

ASL Sign Language Pocket Sign by Trent Ewald

Video ASL lessons learn fast!
Strong Contender
📚 Education
4.8😊(38K ratings)
FreeIn-App Purchases
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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
  • 👍 Great for beginners

Room to Improve

  • 🐛 Incorrect signs in some lessons
  • 🐛 Flashcard answers always 'yes'
  • 💰 Limited free content, need to pay for more
  • 🐛 Sentences with unfamiliar signs
SignSchool#3

SignSchool by SignSchool Technologies LLC

Learn American Sign Language
Worth Considering
📚 Education
4.5😊(136 ratings)
Free
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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
  • 👍 Appreciate the free app

Room to Improve

  • 🐛 Blank topics page, some features not working
  • 🐛 Videos load slowly, hard to see signs
  • 🐛 Missing common words in dictionary
  • 🐛 Inconsistent or incorrect signs
  • 🐛 Lack of context for sign usage

More Sign Language Dictionary apps to explore

FAQ about Sign Language Dictionary

What are the best sign language dictionary apps for iPhone?
Sign ASL tops our sign language dictionary apps ranking as of September 2026, with a 4.1-star average from 90 App Store ratings, and it's free to download.
Yes — 17 of the top sign language dictionary apps we rank are free to download, including Sign ASL and ASL Sign Language Pocket Sign.
Sign ASL shows ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 248+ sign language dictionary apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
This app is a mobile American Sign Language dictionary. It allows users to search and compare thousands of words and phrases in ASL, with over 20,000 video demonstrations available.
The app features a searchable dictionary of ASL signs, a vast library of over 20,000 video demonstrations, and the ability to easily view and compare signs on a mobile device.

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