Fingerspelling Trainer is an Android application developed by FOUND. It falls under the Education & Reference category and is a free app. The app is designed to make learning American and Japanese Fingerspelling easy and fun. The developer, who can use Japanese Sign Language, has used real images of hands in the app to make the learning process more realistic.

The app is incredibly efficient and requires less than half the storage of other apps in the same category. It aims to teach users how to use Fingerspelling smoothly, making the use of Sign Language more accessible and enjoyable. FOUND's ultimate goal is to increase the number of people around the world who can use Sign Language.

Overall, Fingerspelling Trainer is a fantastic app for anyone looking to learn Sign Language. It is efficient, easy to use, and provides an authentic experience.