My app Love to Learn Sign Language, a Bangla Sign language dictionary is finally available for both Android and Apple IOS.
Playstore (for Android):
https://play.google.com/store/apps/details?id=com.love2learnsign.app
AppStore (for Apple IOS):
https://apps.apple.com/fr/app/love-to-learn-sign-language/id6757427283?l=en-GB
Give it a try.