Start for free. Upgrade when you need more. No card required.
Steady Practice — Personal
Run rigorous RCTs on sleep, focus, fitness, nutrition, and habits.
Everything you need to start experimenting on your habits.
For serious self-experimenters who want deeper analysis.
Reinforce OS — Organizational
Causal A/B testing for teams — pricing, product, policy, operations.
One workspace for small teams getting started with causal A/B testing.
For growing teams running multiple experiments across products.
For large organizations with advanced security and compliance needs.
No. All free tiers are genuinely free — no card required. You only need one when you upgrade to a paid plan.
Steady Practice is for individuals experimenting on personal behaviors — sleep, focus, fitness, nutrition. Reinforce OS is for teams running controlled experiments on business decisions: pricing, product features, policies, and operations.
Paired t-test and z-test for standard outcomes, AIPW doubly-robust estimation for causal inference, Bayesian posteriors with credible intervals, and e-value sensitivity analysis for unmeasured confounding.
Yes. Your experiment data is private by default and never shared or sold. You can export all your data at any time.
Reinforce OS aggregates evidence across similar experiments to accelerate statistical convergence. Your results contribute to shared priors; shared priors improve your results. This is a structural advantage that individual experiments cannot replicate.