Thank you for the kind words. :-) Although that app you linked is a bit different - it's showing when names were popular over time. This app goes one step further and calculates how many of those people are still alive and makes a best guess at how old someone is based solely on their first name.

I also made a version similar to the Baby Name Wizard that look solely at name popularity here: http://rhiever.github.io/baby-name-explorer/

And I suppose it's just a matter of aesthetics for which one you prefer in that case.

Cheers!

r