What is Reddit's opinion of Isotope - Periodic Table?

From 3.5 billion Reddit comments

I found this app called "Isotope" today: a beautifully designed periodic table: https://play.google.com/store/apps/details?id=com.underwood.periodic_table

Try Isotope

Name of app is isotope

I like this icon from the Isotope app:

https://play.google.com/store/apps/details?id=com.underwood.periodic_table&hl=en