Sign Language Learning App for Android with Video Lessons and Practice Quizzes

The Sign Language Learning App for Android with Video Lessons and Practice Quizzes teaches Indian Sign Language (ISL) through short videos of a real signer, so learners copy hand shape, movement, and facial expression together instead of guessing a sign from a written description. Many beginners try to learn signs from text lists or still images, and that route hides exactly what matters: where the hand starts, which way it moves, and how fast. The result is slow progress, signs that look close but are wrong, and no way to check what was actually learned. This app closes that gap with one clear loop per sign: watch the video, read the hand-shape steps, mirror the sign at half speed, then answer a sign-to-word quiz. Progress, streaks, and missed signs are tracked on the device, so revision returns to the signs a learner actually got wrong.

The Sign Language Learning App for Android works as a short, repeatable loop: the learner picks a lesson, watches a video of a real signer performing one sign, reads the numbered hand-shape steps beside it, and mirrors the movement at half speed or in mirror view. Each sign ends with a sign-to-word quiz question, and the app records which signs were answered correctly and which were missed. Missed signs go into a review list that appears first in the next session, while completed lessons, minutes practised, and the daily streak are stored in the on-device database. Lessons are downloaded once and then play offline, and the optional camera view shows the learner beside the lesson still so hand position can be compared by eye, with no score given because the camera does not recognise signs.

1. The learner opens a lesson from the home screen, for example Greetings, and sees its signs listed with a video length and a progress bar.
2. Tapping a sign opens the lesson player: the video plays, and the numbered hand-shape steps sit beside it with slow-motion, loop, and mirror controls.
3. The learner mirrors the sign at 0.5x speed, optionally opening the camera view to compare their hand position with the lesson still.
4. After the signs in a lesson, the app opens a 10-question sign-to-word quiz: a sign video or still is shown and the learner picks the matching word.
5. Each answer gets instant feedback, including which similar sign it is usually confused with, and missed signs are added to the review list.
6. The progress screen updates completed lessons, quiz scores, minutes practised, and the daily streak, all stored locally in the Room database.

Tech stack:

• Kotlin
• Android Studio
• Jetpack Compose · Material 3
• Room database
• ExoPlayer · offline video playback
• CameraX · camera practice view
• WorkManager · practice reminders
• Git

The Sign Language Learning App for Android centres on three capabilities that work as one learning loop: video sign lessons filmed with a real signer, sign-to-word practice quizzes after every lesson, and progress tracking that sends missed signs back for review. The video lessons carry the teaching, with slow-motion replay, looping, and a mirror view so a learner can copy hand shape and movement accurately. The quizzes carry the checking, showing a sign and asking for its word, with instant feedback and an explanation of the usual mix-up. The progress screen carries the revision, listing the signs missed in quizzes, the daily streak, and minutes practised, so the next session starts with the weakest signs rather than the easiest ones, and the daily streak keeps the habit visible without any leaderboard or social pressure.

• [Video sign lessons] Short videos of a real signer for every sign, with 0.5x slow-motion replay, looping, and a mirror view so hand shape and movement can be copied accurately.
• [Step-by-step hand-shape notes] Numbered notes beside each video state the starting position, the direction of movement, and the common mistake for that sign.
• [Sign-to-word practice quizzes] Each lesson ends with a 10-question quiz that shows a sign and asks for its word, with instant feedback and the usual mix-up explained.
• [Fingerspelling trainer] One hand shape per letter across 26 letters A-Z, with timed recall practice that separates similar shapes such as A, S, and T.
• [Camera practice view] The app can open the camera so the learner compares their own hand position with the lesson still side by side; it is a practice-matching aid only and gives no score.
• [Offline lessons and progress tracking] Downloaded lessons play without internet, and completed lessons, minutes practised, quiz scores, and the daily streak are stored in the on-device Room database.
• [Review list for missed signs] Signs answered wrong in quizzes return first in the next session, so revision focuses on the weakest signs instead of repeating the easy ones.

• Complete Android app source code in Kotlin with Jetpack Compose
• Lesson content pack: 12 lessons and 48 signs with video lessons and hand-shape notes
• Sign-to-word quiz bank with 10 questions per lesson and a review list
• Fingerspelling trainer for 26 letters A-Z
• Camera practice view and offline playback with Room database storage
• Project report PDF (background, methodology, architecture, outcomes)
• PPT presentation for final review
• Viva Q&A preparation document