Siri has an excellent dictation feature that can be used in a variety of applications.
This demo takes you through an example showing how it can be useful.
Featured image By Columbia Phonograph Co. – Downloaded 2008-1-12 from Clarence Charles Smith (1922) The Expert Typist, MacMillan Co., New York, USA, p.123, fig.37 on Google Books. The photo is credited (p.122) to the Columbia Phonograph Co., Public Domain, https://commons.wikimedia.org/w/index.php?curid=3375549
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