From the app’s FAQs -
“The COVID symptom tracker was created by doctors and scientists at King's College London, Guys and St Thomas’ Hospitals working in partnership with ZOE – a health science company.
The app will be used to study the symptoms of COVID-19 and track the spread of this virus. This research is led by Prof. Tim Spector, professor of genetic epidemiology at King’s College London and director of TwinsUK”
Good Morning Saturday 18th July 2026


Yes, there will be a minimum version needed, apps can’t work on every operating system, so as you say it could be your phone is too old.
