"We haven't found a way to translate … limited usage into widespread adoption in the daily health routines of millions of people," Google said in an online posting, ComputerWorld reported Tuesday.
The service, which was offered as a way to store medical records in one place -- PHR stands for personal health records -- found an audience among a limited number of technocrats and health fitness types.
But a recent survey showed 50.6 percent of consumers were unaware such a service even existed.
And, IDC Health Insights analyst Lynne Dunbrack said, for many the service had limited utility.
"It's not something that a person wakes up in the morning and says, 'Hey, I need one of these things,'" Dunbrack said.
Google said it would close down the service at the end of the year.