Learn sign language
with your hands.
A 3D hand shows you each ASL sign. Vision Pro tracks your hand live and judges your accuracy in real-time. Free forever.
Learn by doing, not watching.
See the sign
A 3D hand floats in your space showing exactly how to form each ASL sign. Inspect it from any angle.
Try it yourself
Hold up your hand. Vision Pro tracks every joint — 15 bend angles and 4 spread angles measured simultaneously.
Get feedback
Joints turn green as you match. Hit 70% accuracy and you pass. It tells you exactly which fingers to adjust.
Nearly 500,000 Americans use ASL as their primary language. But the people around them — parents, partners, coworkers — almost never know how to sign.
Every learning tool until now has been flat. Sign language is three-dimensional. The learning tool should be too.
SignX was built because a close friend lost their hearing. We believe the ability to communicate with the people you love should never be blocked by a learning gap — or a price tag.
Privacy Policy
SignX does not collect any personal data.
The app runs entirely on-device. No data is sent to any server. No analytics, no tracking, no accounts.
Hand tracking data is processed locally by ARKit. Hand positions are used solely for real-time comparison and are never stored or transmitted.
Progress data is stored locally on your device using UserDefaults. It never leaves your device.
No third-party services are used. No analytics SDKs, no ad networks, no cloud services.
Questions? Contact steven@skylark.dev
Last updated: April 9, 2026