This demo runs one model for everyone. In about five minutes of drawing letters we fine-tune a copy to your handwriting — typically +5–10 points, up to ~20 for hands it finds hard.
Train it — 5 minEnter the code from your email.
Lost the email? Type the address you trained with and we'll send the link again.
Wrap your hand around the lower half and hold it the way you'd use a TV remote — top edge pointing away from you. Your wrist and forearm guide the writing, not your fingers.
one letter per press · not cursive swipe right ⟶ = space
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The writing demo runs one model for everyone. Draw the alphabet twice — about five minutes — and we fine-tune a copy to your hand. Typically +5–10 points of accuracy, up to ~20 for hands it finds hard.
We take the general recognizer and fine-tune a copy of it on the letters you draw here, then check it against letters we hold back — you only get a model that reads you better than the standard one. We store your motion recordings and your email to build and deliver it; nothing is shared or sold, and replying to any of our emails deletes everything.
You'll see one letter at a time. Hold the phone like a TV remote. Press and hold the big button, draw the letter in the air, let go. Draw it the way you write it — the font is only a hint.
When it's ready — usually within a few minutes — we email you a link that loads your model on the writing page. Typical result: 80 % → 90 % of letters read right; hands the general model finds hard can go from about 60 % to 80 %.
By pressing Start you agree that Inputa stores your email and the handwriting recordings you make here, to build your personalized model. Nothing is shared or sold. Want it gone? Reply to any of our emails and we delete everything.
Hold the phone like a pen (or a TV remote), press & hold the record button, draw each prompted letter in the air, release. Takes about 15 minutes for the full set (144 captures, 48 prompts × 3 reps). You can quit at any time.
Saved on the server at ~/phone_onboarding/.
Used only to label your saved session — never uploaded.
Once we've learned your handwriting we'll let this address know. Type it into the writing demo to write with your own model.
By continuing you agree that Inputa stores your email and the handwriting recordings you make here, to build your personalized model. Nothing is shared or sold. Want it gone? Reply to any of our emails and we delete everything.
Pick the hand you'll hold the phone in.
Helps us check the dataset is balanced.
Just the number, in years.
Optional. Tell us anything that might affect how you draw — injury, glasses, etc.
We need access to your phone's motion sensor (accelerometer) so it can read the letters you draw in the air. Tap the button below — your browser will ask once.
Nothing is uploaded until you finish a capture. Your motion data stays on your phone except when posted to the server for inference.
Wiggle your phone a little — we'll watch for samples flowing and a single press-and-release of the big record button to confirm everything's wired up.
waiting for sensor permission…
Give the phone a quick wave to confirm the motion sensor is reaching us. The check on the next page won't unlock until samples are flowing.
The next page shows one prompt at a time. Press & hold the big record button, draw the prompt in the air, then release. The session takes about 15 minutes; you can pause or quit at any time.
Draw each letter the way you would write it — the font on the page is only a hint at which character. Don't try to copy its exact shape.
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— / — done
Saved — of — recordings.
Saved to —. You can close this tab, or run
another session from the start.
We'll email — when your model is ready, usually within a few minutes. Then open the writing page and load it — you'll see the difference.
You stopped before two full rounds — we'll email you either way, and another round with the same address tops it up.
One quick thing
Spell School reads how you move your phone through the air. Tap below and choose Allow so it can sense your writing.
Motion access is off. Turn it on in Settings → Safari → Motion & Orientation Access, then reload.
1 / 6
Draw it in the air — press & hold the button, draw, release.
🔒 Share your score to reveal your stats
Royal Academy
One quick thing
Spell School reads how you move your phone through the air. Tap below and choose Allow so it can sense your writing.
Motion access is off. Turn it on in Settings → Safari → Motion & Orientation Access, then reload.
1 / 6
Draw it in the air — press & hold the button, draw, release.
Well done!
0
You banished the Devil 😈🪄