Choose the right path
Use the guided planner for t-tests, proportions, chi-square, ANOVA/ANCOVA/contrasts, regression, logistic/Poisson/ordinal, mediation, equivalence, meta-analysis, sequential, and Bayes-factor designs.
Open the guided planner →Model complexity honestly
Use simulation when people are clustered, measured repeatedly, missing over time, or analysed with a model that a simple formula cannot represent.
Open the simulation lab →Inspect the evidence
See which calculations are independently checked, which assumptions match external tools, and which methods are still under development.
See how results are checked →How this matches the original programmePowerBench is the calculation and quality-assurance engine. PowerMate is this beginner-facing planning interface. The Guide teaches the methods in depth. Meta-Power is a separate research workflow for studying how published articles report power analyses; it is intentionally not mixed into your planning form.