Safe Anytime-Valid Inference R package safestats version 0.8.7 Functions to design and apply tests that are anytime valid. The functions can be used to design hypothesis tests in the prospective/randomised control trial setting or in the observational/retrospective setting. The resulting tests remain valid under both optional stopping and optional continuation. The current version includes safe t-tests and safe tests of two proportions. For details on the theory of safe tests, see Grunwald, de Heide and Koolen (2019) "Safe Testing" <arXiv:1906.07801>, for details on safe logrank tests see ter Schure, Perez-Ortiz, Ly and Grunwald (2020) "The Safe Logrank Test: Error Control under Continuous Monitoring with Unlimited Horizon" <arXiv:2011.06931v3> and Turner, Ly and Grunwald (2021) "Safe Tests and Always-Valid Confidence Intervals for contingency tables and beyond" <arXiv:2106.02693> for details on safe contingency table tests. Software Depends: R (>= 3.6) Imports: stats (>= 3.6), hypergeo (>= 1.2-13), survival (>= 3.2-13), BiasedUrn (>= 1.07), boot (>= 1.3-28), dplyr (>= 1.0.6), purrr (>= 0.3.5), rlang (>= 1.0.6) Suggests: testthat (>= 3.0.0), knitr, rmarkdown, graphics Alexander Ly <a.ly@jasp-stats.org> Comprehensive R Archive Network (CRAN) Rosanne Turner [aut], Alexander Ly [cre, aut], Muriel Felipe Perez-Ortiz [ctb], Judith ter Schure [ctb], Peter Grunwald [ctb] LGPL (>= 3) 2022-11-24 application/tgz https://CRAN.R-project.org/package=safestats doi:10.32614/CRAN.package.safestats en-GB