Reported by news.com.au, several - now COVID positive - people shared they discovered they were unwell in unusual ways on social media.
Thirty-seven-year-old woman, Sally Larson, reported that her fertility tracking app notified her of a change in temperature. She stated that: "I use an app which records my daily temperature as a way to monitor my cycle."
"It came up with a notification I'd never seen before. It gave me an alert that my temperature was outside of my normal range, and that I could be ill or might have entered it incorrectly."
The temperature recorded was still under 37.5 degrees – generally considered 'normal' by medical standards.
However, Larson stated that "for me - it was high" as she typically had quite a low body temperature, according to the months of data collated in the app.
Low and behold, she did test positive for COVID-19.
COVID isn't the only illness that includes symptoms like a higher body temp, higher heart rate and changes to your respiratory system. However, the increased temperature, along with other COVID symptoms, could aid in ensuring people are tested and diagnosed.
Another woman, Melbourne personal trainer Bernadette Knight, was self-isolating after being deemed a close contact and made it through without any symptoms and a negative RAT on day six.
"To celebrate my release, I went on a 10km run on my first morning of freedom," she said. "Except I noticed it seemed a lot more difficult than usual." which she put down to being inside for so many days.
However, upon returning home and reviewing the stats on her smartwatch, she saw her heart rate was significantly higher than usual.
"I took another RAT and this time, it was positive. Another seven days of isolation was a bitter pill to swallow, but I am glad my watch alerted me to it all the same – otherwise, I might have been out there infecting people."
Dr Karen Price, president of the Royal Australian College of General Practitioners (RACGP), stated the importance of not relying on these apps as a diagnostic tool.
"Remember, these apps are not a diagnostic tool, and we mustn't rely on products that are not TGA-approved. That said, it may certainly be valuable to understand more about our health through this type of data-tracking."