Code and Obtain Customized Planned Comparisons with 'appRiori' R package appRiori version 0.0.6 With 'appRiori' <doi:10.1177/25152459241293110>, users upload the research variables and the app guides them to the best set of comparisons fitting the hypotheses, for both main and interaction effects. Through a graphical explanation and empirical examples on reproducible data, it is shown that it is possible to understand both the logic behind the planned comparisons and the way to interpret them when a model is tested. Software Imports: dplyr, DT, hypr, markdown, MASS, pracma, rhandsontable, shiny, shinythemes, sortable, stringr Umberto Granziol <umberto.granziol@unipd.it> Comprehensive R Archive Network (CRAN) Umberto Granziol [aut, cre], Maximilian Rabe [aut] (ORCID: <https://orcid.org/0000-0002-2556-5644>), Andrea Spoto [aut], Giulio Vidotto [aut], Marcello Gallucci [aut] GPL (>= 3) 2025-02-27 application/tgz https://CRAN.R-project.org/package=appRiori doi:10.32614/CRAN.package.appRiori