Ship what
actually works.
Know whether a test really won, how long to run the next one, and whether a change is safe to roll out. Significance, confidence intervals, chance to beat control, traffic-split checks and feature flag hygiene, in one free tool that never leaves your browser.
Pricing
Start free. Go Pro when it earns its keep.
ARQS ExperimentLab stays free to try with no account. ARQS ExperimentLab Pro is a one-time licence for your business, delivered within 72 hours.
Free
- A/B significance, intervals and sample-ratio checks
- Test planner and ship gate
- Runs privately in your browser
ARQS ExperimentLab Pro
- Licensed offline copy for your business
- Hypothesis, test-plan and ship-gate templates
- Feature-flag cleanup register
- v1 updates + 30 days email support
Secure checkout on the ARQS Shopify store. Your Pro package ships, sends or downloads within 72 hours of payment, or you get a full refund. No subscription.
No more false wins.
Most A/B tests are stopped too early, read with the wrong math or shipped with a broken traffic split. ExperimentLab catches all three before you roll anything out.
Every launch, checked six ways.
Results entered, traffic split healthy, sample size reached, a full week of data, a significant win and a healthy guardrail metric. Only then does a test say "Ship B".
Results you can trust
Two-proportion z-test with confidence intervals on the lift, plus the Bayesian chance that B beats A, side by side.
Plan before you launch
Sample size per variant and run time from your baseline rate, minimum effect, power and daily traffic.
Flag hygiene
Track feature flags with owners and rollout. Stale, ownerless and fully-shipped flags are flagged for cleanup.
Your experiment workspace.
Sample data is loaded so you can explore. Replace it with your own numbers; everything saves automatically in this browser only.
Conversion test
Average value test (revenue per visitor, order value, time on task)
| Flag key | Owner | Rollout | Last changed | Health |
|---|
Rules: fully on or fully off for 30+ days means remove the flag; a partial rollout untouched for 14+ days is stalled; every flag needs an owner.