Haven't seen your mom or dad in a while? Want to feel kind of terrible about yourself? This is the site for you.
The site's interface is simple: you pick the country where you live, enter the number of times you see your parents in an average year, and write their current ages.
Then you get a number, which is generated based on the WHO's Life Expectancy Data from 2011.
It's a stark reminder that our time with our parents (and our time in general) is limited, and that's exactly the point.
Here's how the four designers of the site, who claim to have put the whole thing together in less than 24 hours, explain their reasons for creating it:
"We believe that increasing awareness of death can help us to make the most of our lives. The right kind of reminders can help us to focus on what matters, and perhaps make us better people."
Online reminders are one thing, but in China, spending time with your aged parents recently became the law.
Earlier this month, adjusted wording in the Law on Protection of the Rights and Interests of the Elderly requires children to provide for the physical and emotional needs of their parents once they reach the age of 60.
That includes visiting them often - and those who don't can face fines or even jail time.
One woman has already been charged under the law, the Wall Street Journal reports.
The woman and her husband were ordered to visit her elderly mother at least once every two months and during two public holidays every year.
According to China's state-run English-language newspaper China Daily, the hearing was held "to highlight the implementation of the law."
Some legal experts in China say it is unlikely too many people will be charged under the newly reworded law.
"It is more aimed at advocacy and encouragement," Song Ci, a Tianjin-based lawyer, told the WSJ. "There isn't any concrete punishment for people who break it."