Uniformity Tests on the Circle, Sphere, and Hypersphere R package sphunif version 1.4.4 Implementation of uniformity tests on the circle and (hyper)sphere. The main function of the package is unif_test(), which conveniently collects more than 35 tests for assessing uniformity on S^{p-1} = {x in R^p : ||x|| = 1}, p >= 2. The test statistics are implemented in the unif_stat() function, which allows computing several statistics for different samples within a single call, thus facilitating Monte Carlo experiments. Furthermore, the unif_stat_MC() function allows parallelizing them in a simple way. The asymptotic null distributions of the statistics are available through the function unif_stat_distr(). The core of 'sphunif' is coded in C++ by relying on the 'Rcpp' package. The package also provides several novel datasets and gives the replicability for the data applications/simulations in García-Portugués et al. (2021) <doi:10.1007/978-3-030-69944-4_12>, García-Portugués et al. (2023) <doi:10.3150/21-BEJ1454>, Fernández-de-Marcos and García-Portugués (2024) <doi:10.1016/j.spl.2024.110218>, and García-Portugués et al. (2025) <doi:10.1080/01621459.2025.2566414>. Software Depends: R (>= 3.5.0), Rcpp Imports: doFuture, doRNG, foreach, future, gsl, rotasym LinkingTo: Rcpp, RcppArmadillo Suggests: CompQuadForm, goftest, knitr, markdown, mvtnorm, numDeriv, progress, progressr, rmarkdown, scatterplot3d, testthat, viridisLite Eduardo García-Portugués <edgarcia@est-econ.uc3m.es> Comprehensive R Archive Network (CRAN) Eduardo García-Portugués [aut, cre] (ORCID: <https://orcid.org/0000-0002-9224-4111>), Thomas Verdebout [aut] (ORCID: <https://orcid.org/0000-0002-3277-9587>), Alberto Fernández-de-Marcos [ctb], Paula Navarro [ctb] GPL-3 2026-06-03 application/tgz https://CRAN.R-project.org/package=sphunif doi:10.32614/CRAN.package.sphunif