Now, smart pen that vibrates when you make spelling error.
Lernstift is a regular pen with real ink, but inside is a special motion sensor and a small battery-powered Linux computer with a WiFi chip.
Together those parts allow the pen to recognize specific movements, letter shapes and know a wide assortment of words. If it senses bad letter formation or messy handwriting, it will vibrate.
Users can choose between two functions:
Calligraphy Mode - pointing out flaws of form and legibility
Orthography Mode - recognizing words and comparing the word to a language database.