Comparison

SignLexicon vs SignChat

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SignLexicon

This app offers a comparative dictionary between Italian Sign Language (LIS) and American Sign Language (ASL). It features side-by-side video comparisons of signs and alphabetic search in Italian or English, serving as a valuable educational tool for language learners.

Highlights
  • LIS and ASL sign comparison
  • Side-by-side video playback
  • Alphabetic search (Italian/English)
  • Extensive sign entry database
  • Educational teaching aid
Read full description

SignLexicon is a comparative dictionary between Italian Sign Language (LIS) and American Sign Language (ASL). It has been developed as a teaching aid within the LILS project to experiment Italy's first bachelor's degree for Sign Language International Mediators. The project has been co-funded by the Italian Ministry for Universities and it is led by a partnership of the University of Parma (project leader), OSSMED Ets (coordinator) and SSML San Domenico University College in Fermo (executor). SignLexicon 1.0 includes around 3,200 entries: 800 LIS signs and their written Italian equivalent, and 800 ASL signs with their written English equivalent. This freeware is available on the main operating systems for smartphones and tablets. The users can either watch one sign language video at a time or both simultaneously by using both windows side by side. This will help them immediately notice the differences between LIS and ASL. They can also choose to use an alphabetic search in Italian or English. SignLexicon 1.0 will be followed by an updated and expanded version in the near future.

About

SignChat

Learn sign language through interactive lessons and visual aids. This app offers a fun and accessible way for children and families to acquire new communication skills. Unlock advanced features and track progress with a premium subscription.

Highlights
  • Step-by-step lessons
  • Visual flashcards
  • Multilingual support
  • Progress tracking
  • Emotion analysis
  • Exclusive content
Features
Read full description

SignChat makes learning sign language fun and accessible for kids and families — with step-by-step lessons, visual flashcards, and multilingual support English. Basic features are free to explore. Unlock premium features with a yearly auto-renewable subscription: • Progress Tracking – Celebrate your achievements and learning history • Game History – Revisit and review completed games • Emotion Analysis – Learn and recognize emotional signs • Exclusive content and upcoming advanced lessons Subscription: $139.99/year with 3-day free trial. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Privacy Policy: https://signchat.online/privacy/ Terms of Use: https://signchat.online/terms/

Screenshots

SignLexicon4 screens
SignChat4 screens

Verdict

The call

The clearest difference is in-app purchases: SignLexicon at none against SignChat's 1. SignLexicon also leads on ads (none vs shown) and iOS requirement (8.0 vs 18.2). SignChat's advantage is update cadence (weekly vs every 3 months). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SignChat sells 1 in-app purchase, starting at $139.99 per year. SignLexicon asks for nothing beyond the download.

UpkeepUpdate frequency

SignLexicon ships an update every 3 months, SignChat weekly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard5 real differences · 5 level
SignLexicon versus SignChat: the parameters behind the verdict, then further details
ParameterSignLexiconSignChat
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews—100.0% of reviews
Number of ratings1 — better—
Update frequencyEvery 3 monthsWeekly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.0 — better18.2
Further details — not scored
Size48 MB79 MB
Age rating4+9+
DeveloperUbisive S.r.l.James Barba

Customer experience

SignLexicon

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

SignChat

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SignLexicon

No in-app purchases

1 purchases

SignChat

Subscriptions1
  • Annual Premium$139.991 Year

Questions

Is SignLexicon free?
SignLexicon is free to download, with no in-app purchases.
Is SignChat free?
SignChat is free to download, with in-app purchases available.
Do SignLexicon or SignChat have ads?
SignChat shows ads; SignLexicon does not.
Which is updated more often, SignLexicon or SignChat?
SignLexicon ships an update every 3 months, and SignChat weekly. Most recently, SignLexicon was updated on November 3, 2026 and SignChat on October 30, 2026.

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