Good

This is fun and informative, but could be better.

One thing I would really like to see are the different forms of decay. For example, H-3 (Tritium) decays into He-3, not H-2. This would be really impressive with the heavier isotopes and their decay chains.

Isotopes such as Cu-64, which decay by more than 1 mode, can really bring science to the plate by randomly choosing which decay mode to implement.

If these features were added, this app could easily be worth the $.99 add-ins.

Boozer441412 about Nuclear