DEF-ISL helps learners master Indian Sign Language with a library of 50,000+ signs and in-built videos and illustrations. Developed by SriJay Software Solutions, the education app targets both adults and children for accessible, practical sign-language learning in EDUCATION. It combines a strong rating (4.58 from 3,720 ratings) with a substantial user base, totaling 100,000+ downloads and 3.4K in the last 30 days.
Pros & Cons
Vast library of signs (50k+) for broad learning
In-built videos provide visual demonstrations
User-friendly design suitable for adults and children
Free to download and start learning
Limited text-based translation or captioning features compared with some competitors
Less emphasis on community or live interaction features
Content focuses on signs and videos; fewer interactive learning modes are mentioned
About DEF-ISL
DEF-ISL is an education app developed by SriJay Software Solutions Pvt Ltd.
How many times has DEF-ISL been downloaded?
DEF-ISL has been downloaded 400 thousand times. In the last 30 days, the app was downloaded 3.4 thousand times.
What is the rating of DEF-ISL?
DEF-ISL is rated 4.58 out of 5 stars, based on 3.8 thousand ratings.
Is DEF-ISL free?
DEF-ISL is free to download. The APK download size is 8.53 MB. The latest version available is 3.0.9. The last update was on February 9, 2026.
What are the requirements for DEF-ISL?
DEF-ISL requires Android 4.2+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since July 2018.
Description
The DEF-ISL app makes learning of sign language easy, accessible and interesting. Packed with 50000+ easy-to-understand signs and phrases, in-built videos, illustrations, this easy to navigate app can be used both by adults and children who are deaf or hearing impaired. The customized mobile app is available for download on iOS and Android platforms.
DEF-ISL offers the opportunity for all to learn sign language and thereby reach out to the deaf more easily.
DEF is an organization made of the deaf, for the deaf, by the deaf, focused on addressing the issues of communication for the deaf and developing methods and resources to improve their connect with the society at large. They aim to make a lasting impact on the future of thousands of deaf or hard of hearing children and adults by providing them access to early identification, hearing technology and expertise to reach their full potential.
2019-2020 app initiative supported by L&T Construction.
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For the first time, the DEF ISL app introduced me to new words and helped me start learning. I had never learned English before. Now that the DEF ISL app is available, I'm interested and excited to learn. Thank you, DEF
★★★★★vaithynathan Nathan· Jul 3, 2025
Hello. I feel like I learn new words with this def isl app. I think it's important for me to utilize for my learning. It helps me to research new words meanings in Indian Sign Language. I had many issues and experiences in facing communication barriers with my friends and family etc. I didn't know writing skills, English and communication. It has access, it's a LOOF help. It makes feel me happy because I'm showing improvement in my communication. Thank you so much for deaf enabled foundation.
★★☆☆☆Wani Bisma· Sep 11, 2026
Very disappointed with this app. It has not been working properly for many days. I have tried using it repeatedly, but the issue still hasn’t been resolved. Please fix the problem as soon as possible, as the app is otherwise very useful.
★☆☆☆☆Yadhav Vakkath· Jun 3, 2025
I am trying to open the app, I don't get the OTP my email ID, I wait the app of def -isl Can you please help me with this
★★☆☆☆Mushirul Haque· Jul 11, 2025
But it is half the words of the institute. It should be done with many words full of A-Z DEF ISL.
★☆☆☆☆Gourav RoR· Jul 4, 2025
Gmail code again bad. Search fail bad. Def isl was old Good
Google Play Rankings for DEF-ISL
This app is not ranked
Technologies used by DEF-ISL
10 permissions·34 libraries
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Trust & Safety: Permissions indicate ad identifiers and standard networking needs (ACCESS_ADSERVICES_AD_ID, ACCESS_ADSERVICES_ATTRIBUTION, ACCESS_ADSERVICES_TOPICS, INTERNET, ACCESS_NETWORK_STATE) plus foreground service and wake lock usage. A dynamic receiver is listed as not exported. No sensitive data permissions (e.g., contacts, location) are listed in the provided data, suggesting standard monetization and background operation without exposed personal data access.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
