Drydock — Shipping Rules vs Koss: Block & Hide Shipping
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 13, 2026 for Drydock, Nov 7, 2026 for Koss.
The short answer
- Both list a free plan. Paid plans start at $29/month for Drydock and $9.99/month for Koss.
- Drydock lists 5 features Koss’s listing doesn’t mention, including Address validation, Custom rules, Hide rates.
Head to head
Free
Starter
Growth
Scale
Free Plan
- · 1 active shipping rule
- · Automatic P.O. Box address detection
- · Cart subtotal min & max restrictions
- · Quick-start recipe templates
Gowth Plan
- · B2B & customer tag rules
- · Priority customer support
- · Product tag matching (heavy, fragile)
- · Up to 5 active delivery rules
Pro Plan
- · All trigger conditions & postal codes
- · Priority email support
- · Unlimited active shipping rules
- · Unlimited orders
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureRule changes shouldn't go live untested. Drydock lets you build rules that hide, rename, or reorder shipping options and payment methods, or block invalid checkouts — and run them against a synthetic checkout before publishing. See exactly what customers would see, with a trace of every condition. Save scenarios as test cases that re-run on every publish.
Koss Ship helps merchants protect shipping margins and prevent fulfillment issues directly at checkout. Easily hide incompatible delivery methods when buyers enter PO Box addresses, ensuring packages are not rejected by carriers. Automatically hide standard paid shipping once a customer qualifies for free shipping, reducing checkout confusion. Filter rates by minimum and maximum cart subtotal.
- Simulate any checkout before publishing — full trace of every rule and condition
- Hide, rename, reorder shipping options & payment methods by address, cart, tags
- Block invalid checkouts with your own message (PO boxes, restricted regions)
- Saved test cases re-run on every publish — catch broken rules before customers
- Hide shipping rates dynamically based on P.O. Box addresses or ZIP codes
- Restrict delivery methods using cart subtotal, product tags, or customer tags
- Reorder and rename checkout shipping options to highlight preferred carriers
- Built with native Shopify Functions running seamlessly during checkout
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Koss | |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Koss | |
|---|---|---|
| App Store rating | Not published | Not published |
| App Store reviews | Not published | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
FAQ
Drydock and Koss: common questions
- Is Drydock or Koss cheaper?
- Both list a free plan. Paid plans start at $29/month for Drydock and $9.99/month for Koss. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- Drydock lists 5 the others don’t mention, such as Address validation, Custom rules, Hide rates, Rename options. Koss lists 2 the others don’t mention, such as Carrier-based, Product-based. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 13, 2026 for Drydock, Nov 7, 2026 for Koss; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 13, 2026 for Drydock, Nov 7, 2026 for Koss. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.