Drydock

Shipping & checkout rules you can test — and undo.

Install free on your Shopify store

You’ll approve the install on Shopify’s own screen — nothing changes at your checkout until you publish a rule.

The safe-rules loop

Build rules for shipping options, payment methods, and checkout validation — in plain English.
Simulate any checkout before publishing, with a trace of every condition and the values compared.
Test suites re-run on every publish — broken rules get caught on the publish screen, not by customers.
Every publish is a version. Roll back in one click.