✦ Free tool · No signup

A/B Test Calculator

Sample size and significance for store experiments.

Baseline conversion (%)

Minimum detectable lift (%)

Visitors per variant

27,179

Low-traffic stores should test bigger changes — small lifts need huge samples.

More free tools

Keep Exploring

Reveal the theme, version and OS 2.0 status of any store.

See which Shopify apps a store runs, from public signals.

18-point score across SEO, trust and technical checks.

Core Web Vitals with Shopify-specific fixes.