voice to script-write

Hi,
Nowadays there is a microphone on everything. Especially on laptop.
It could be great to had a voice recognition which transform your voice into clear readable text with punctuation (,.?/ \ _ 1&)
, and special caracters (€, lambda, gamma, integral, equation..).
It could be great for developper who are fluent in coding language(s) (tell the code), and writers (tell your words, like on android phones, but in better with punctuation)...
If something like this already exist pls add it to the essential apps.