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Touting calculators for both novice chromatographers and more experienced users, the Chromatography Calculator app from Tosoh Bioscience provides a number of easy-to-use—yes, you guessed it—calculators. Some of the calculations are simple—such as calculating the volume of a chromatography column given its length and radius—while other calculations (such as for mobile phase porosity and theoretical changes in pressure after changing particle size) require more brainpower than a simple recollection of high school geometry formulas. The app includes 14 calculators in total, as well as unit conversion tools for pressure, volume, and length. While useful, the calculators are embedded within an app that is largely commercial in nature; thus, users must navigate to the calculator tab (i.e. it is not prominently displayed on the home screen).