The 'Someone Like You' hitmaker has to rest her vocal cords after surgery for a haemorrhage – which caused her to cancel all of her concert dates for the rest of 2011 - and has taken to utilising her cell phone as a way to continue to communicate with people.
A source told The Sun: "She's been using the speaking app to buy coffee at Starbucks and to order cabs.
"It is far easier to communicate using it rather than writing everything down on paper and showing people."
The 23-year-old singer is still in Boston, where the operation took place, but is recovering well.
She recently revealed she was now "chilling out" until the doctors give her the all-clear and she can return to her home in the UK.
Writing on her blog, Adele said: "Thank you for all your positive thoughts and get well wishes. I'm doing really well, on the mend, super-happy, relaxed and very positive with it all.
"The operation was a success and I'm just chilling out now until I get the all clear from my doctors."