Monthly Archives: September 2014

ChemTrix Chemistry Calculator for iPad

The kind folks at Black Rhino have supplied me with a copy of ChemTrix Chemistry Calculator for the iPad ( It is currently listed for $3.99 CAD. It has been evaluated on an iPad mini.


First Impressions:

The ChemTrix Chemistry Calculator app is exactly as the name advertises, an app to calculate typical chemistry values.



All undergraduate chemistry courses require that some fundamental calculations are performed, both in the lecture and lab. Most calculations are fairly straight forward, as long as students possess the basic skills of unit conversion (dimensional analysis).


The App:

The opening screen features a large periodic table and number keypad. Simply choose the elements you want and punch in how many, then hit the orange checkmark button!

photo 2 (2)


It will list the molecular weight on the main page, but clicking on the information button ( a lowercase “i” in a circle),  it shows things such as the empirical formula, average mass,  monoisotopic mass,  percent composition (by mass) and converts between grams and moles. There is also a concentration calculator in the top right corner.

photo 1 (2)






All units in the mass-mole conversion/concentration calculators can be changed to the most common SI prefixes from nano to giga.

photo 2 (3)

A mass distribution plot is also present, but is disappointing as it does not have axis titles/values. However, a peak table is given by clicking the arrow at the bottom right corner.

photo 1 (3)

Back in the main screen, clicking on the icon that looks like two pieces of paper brings up a menu featuring the history of your previous searches, and surprisingly large lists of commonly used organic groups, ions, ligands.

photo 2

Clicking the right arrow button opens up a menu of programmable buttons, which would be handy for commonly used moieties.


A help menu is available and is well written.

photo 3 (3)

Final Impressions:

Overall, this app can quickly determine molecular weight and perform some commonly used conversions, and has a surprisingly large amount of groups, ions and ligands programmed in. However, the conversions it can perform could be done fairly quickly by a relatively competent grade 11 student with a calculator, pen and paper.



The author received a copy of the software, but received no other compensation.