Learn ASL is a web app that you can only use with a smarthphone.
American sign langage (ASL) is a language that uses signs made by moving your hands, using facial expressions and postures of the body.
Sign language is different in every country and even sometimes in different regions. For example, Americans who speak ASL won't directly understand British people who speak British Sign Language (BSL).
ASL and every other sign languages have their own rules when it comes to grammar and punctuation. For example, a sentence for hearing people would be: "Can you pass the salt please ?" and in ASL it would literally be "You pass salt please". Also ASL users ask a question by raising their eyebrows, widening their eyes, and tilting their bodies forward.
This app will help you learn a few greeting words and sentences as well as to spell words you don't know how to sign.
You can click here if you want to know more about ASL.