🖐 Sign tab — the camera reads your hand. Built in: the ASL fingerspelling alphabet (A–Z), numbers 1–5, with J and Z as moving signs. Letters that look identical (like U and 2) are shown together. Everything runs on your device — no internet needed, nothing is uploaded.

🎓 Train tab — teach tulande your own signs, including full Zambian Sign Language words. Name a sign, hold record, repeat 3–5 times. Trained signs are recognised automatically in the Sign tab and during calls. Export a sign pack file and share it so friends' apps learn the same signs.

📞 Call tab — free video calls for up to 4 people. Sign during a call and your words appear as live captions on everyone's screen, and can be spoken aloud for hearing friends. Hearing friends tap 🎙 so their speech becomes captions for you. Chat is built in too.

Calls need a tiny free Cloudflare Worker that only exchanges connection handshakes. Full instructions ship with the app package (README in the deploy kit). After deploying it, paste its address into the "Signaling server" field on the Call tab — once per device.

Fingerspelling and trained signs work well; full continuous sentence translation is beyond today's technology for any sign language. tulande gets better the more you train it — and your training never leaves your device unless you share a pack. Some similar letters (M/N/S/T) are genuinely hard — the app shows its second guess, and you can train those letters yourself to make them yours.

Camera processing, sign training and recognition are 100% on-device. Calls are peer-to-peer. The signaling worker stores only short-lived handshake records (auto-deleted in minutes). No accounts, no analytics, no tracking.