SignSpeak AI is an Android-based artificial intelligence application that translates sign language gestures into readable text and audible speech in real time. It combines Android development, computer vision, and deep learning technologies. MediaPipe Hands detects twenty-one hand landmarks from live camera input, while a TensorFlow Lite model classifies gestures into alphabets, common words, and predefined conversational phrases. The application converts recognized gestures into text, generates voice output using Android Text-to-Speech, supports offline AI inference, Firebase Authentication, SQLite history storage, and CameraX integration.