I'm a father to two little boys and tracking their growth is typically done on paper charts such as <a href="https://www.cdc.gov/growthcharts/data/who/GrChrt_Boys_24LW_100611.pdf" rel="nofollow">https://www.cdc.gov/growthcharts/data/who/GrChrt_Boys_24LW_1...</a> which are not very usable on screens and require you to draw lines with pen on the paper for accurate tracking.
So I made a digital version instead with React and D3.<p>The charts are limited to those for children under two years of age since growth charts for older children differ based on nationality.