If you're looking to learn American Sign Language (ASL), the ASL Sign Language - Pocket Sign app by MobiReactor is a great tool to have. This free app is available for Android and offers hundreds of video lessons that are packed into small, easily digestible segments.

One of the best features of the app is the interactive questions that accompany each lesson. These questions help you to practice what you've learned and ensure that you're retaining the information. Additionally, the app offers a fun and engaging way to learn sign language by using items to make the learning process easier and more enjoyable.

The app covers a wide range of topics, including the sign language alphabet, common phrases and greetings used every day, baby sign language, and basic sign language phrases. Furthermore, the app includes an ASL dictionary, making it easy to look up signs as needed.

Overall, ASL Sign Language - Pocket Sign is a fantastic app for anyone looking to learn ASL. The interactive lessons, fun questions, and comprehensive coverage make it a valuable tool for beginners and more advanced learners alike.