A service called 'That can be my next tweet!' has existed since 2013 that analyzes a person's Twitter stream and attempts to create a Tweet that they could have written.
Journalist Adam Ostrow gave a TED talk on this very subject in July of 2011 - 'Adam Ostrow: After your final status update'.
When Martha clicks the 'touch to talk' button, the clocking symbol on the computer is the same one as starts off the Black Mirror series.
This is the first Black Mirror episode with a female protagonist.