Now, smart pen that vibrates when you make a grammatical error
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A German firm claims to have created a hi-tech pen which vibrates every time it senses a spelling or grammar mistake.
German company Lernstift developed the pen to help youngsters learn to write, but it could catch on with people of all ages.
The pen, which is at the prototype stage, is capable of picking errors in spelling or letter formation in real-time, delivering a warning vibration to the writer's hand.
Users can choose between two functions: Calligraphy Mode - pointing out flaws of form and legibility or Orthography Mode - detecting orthographic and grammatical mistakes, the 'Daily Mail' reported.
Sensors built into the pen detect variations in the way letters are formed and buzzes immediately if an error is spotted.
Creators Falk and Mandy Wolsky were inspired by their son's early writing attempts, according to their website Lernstift.