The "Ultimate Chemistry Calculator" contains nine specialized calculators that perform specific types of mole related conversions. These conversions involve converting from one unit to a goal unit within the general bidirectional pathway Grams to Moles to Particles, where Particles represents Atoms or Molecules. However, if working with Molecules, it is also possible to convert to Atoms. Upon choosing which conversion is needed, users can choose the calculations tab and simply type in the numbers given within a conversion problem and press calculate. Whats great about this app is that upon moving over to the calculations tab after selecting a calculator, the entire problem is already setup visually in terms of how many ratios are present for the particular conversion problem (the user just has to punch in the numbers). There is also a brief review of mole conversions within the review section located under the Review tab.