Google Digital Ink

Google's ML Kit Digital Ink Recognition API converts handwritten strokes into digital text and sketches across 300+ languages using on-device machine learning.

This technology tracks touch-screen coordinates (X, Y, and timestamp) to interpret handwriting and drawings in real time. It supports 300+ languages and 1,000+ emojis: all processed locally to ensure speed and data privacy. By utilizing pre-trained models, developers can integrate handwriting recognition into apps for note-taking, math equations, or shape detection without a persistent internet connection.

https://developers.google.com/ml-kit/vision/digital-ink-recognition