Is there any pen in magic shops, that allows to record movements of pen and get to know words person writes?
It can be done by movement sensors and Bluetooth connection to smartphone.

Brilliant! That'll make some $$$ for sure...!

:)

Doug

I remember seeing one advertised years ago, but it required a special clipboard that did not look like a normal "from OfficeMax" object.

There was also one linked to a pair of glasses with sensors that assisted in the pattern recognition.

Neither had any way of transmitting the information, but the first could be hardwired to a computer.
Maybe they have added WiFi technology since then.

Check out assistive technology for persons with disabilities rather than magic shop.

Smart pens exist, but they are fairly obvious electronic devices.

I can see how it would be possible to rig one, maybe with NFC that was not so obvious although I don't have the technical skill to do it.