Not worth it
Not even worth paying $2 for this app
Frustrating to use
Great idea, but I have to tap the electrons protons and neutrons many times before they will drag - so frustrating that I won't use the App....
Very good app
This app would be even better if you could create more shells and up to 9999 value for atomic #s and mass. Can you please make this adjustment thanks. One thing it locks up sometimes with the iPod when dragging e- p+ n in the atom.
