If you’re in the business of analyzing or sorting fluorescently labeled cells, the BioLegend Flow Cytometry App is right up your alley. This app provides a number of great resources for researchers who use flow cytometry, with an emphasis on designing and optimizing experiments in which multiple fluorophores are used. The resources include a page on fluorophores in which users can show all fluorophores for a given excitation laser, a fluorescence spectra analyzer, and a fluorophores brightness index. There are also sections for flow cytometry troubleshooting, flow cytometry buffers, and video tutorials. Unfortunately, much of the app relies on redirecting visitors to the relevant sections on the company’s website; therefore, one must have internet access (or a cellular data plan) in order to use the app.