Extend B2B Address Book vs PO Box Blocker Pro
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 15, 2026 for Extend B2B Address Book, Nov 8, 2026 for PO Box Blocker Pro.
The short answer
- On the Shopify App Store: Extend B2B Address Book 5.0 from 2 reviews and PO Box Blocker Pro 1.0 from 1 reviews.
- Paid plans start at $49/month for Extend B2B Address Book and $2.99/month for PO Box Blocker Pro.
Head to head
- Canada
- United States
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Core
- · Add and use addresses at checkout
- · Add multiple addresses per location
- · Get address visibility in Shopify admin
Essential
- · Auto health checks & self-repair
- · Block addresses FedEx, UPS & DHL reject
- · Built-in address tester
- · Custom checkout message
- · One-click automatic setup
- · Real-Time PO Box Blocking
Pro
- · Everything in Essential
- · Exempt products, variants, collections
- · PO boxes, lockers, bags & APO/FPO
- · Priority email support
- · Rules by country, state, city & postal
- · Unlimited orders and validations
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureB2B buyers ship to multiple locations — and managing that through emails, support tickets, or a single checkout field doesn't scale. This app gives buyers a structured address book per company location: save, edit, and select from stored addresses at checkout, with temporary one-time entries kept separate.
PO Box Blocker Pro checks each shipping address at checkout and blocks addresses you can't deliver to before the order is placed. Block PO boxes, parcel lockers, locked bags, private bags and APO/FPO addresses, or restrict delivery by country, state, city or postal code. Allow chosen products, variants or collections to bypass the rules, set a custom checkout message, and test any address before going live.
- Manage multiple reusable shipping addresses per B2B company location.
- Let buyers choose the correct shipping address during checkout.
- Support temporary checkout addresses without cluttering the saved list.
- Keep saved, temporary, and default addresses clearly organized.
- Automatically detects and blocks PO Box addresses during checkout.
- Allows merchants to exempt specific products from PO Box blocking.
- Customize the message shown when customers enter a PO Box address.
- Works seamlessly with Shopify Checkout and doesn’t require any theme edits.
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 |  Extend B2B Address Book |  PO Box Blocker Pro |
|---|---|---|
| Detected stores | Not published | 3 |
| 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 | Home & Garden, Business & Industrial |
| Top store countries | Not published | Canada, United States |
Reviews
| Measure | Extend B2B Address Book | PO Box Blocker Pro |
|---|---|---|
| App Store rating | 5.0 ★(ahead) | 1.0 ★ |
| App Store reviews | 2(ahead) | 1 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Extend B2B Address Book | PO Box Blocker Pro |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $49/month | $2.99/month(ahead) |
| Longest free trial | 7 days | 14 days |
| Plans listed | 1 | 2 |
Listing
| Measure | Extend B2B Address Book | PO Box Blocker Pro |
|---|---|---|
| Shopify category rank | #129(ahead) | #276 |
| Shopify App Charts | Not on this week’s charts | #3 in Shipping solutions - Other |
| Built for Shopify | No | No |
| Launched | Feb 17, 2026 | Jul 4, 2025 |
| Languages | 1 | 1 |
| Developer | Codup | Dev Kit |
FAQ
Extend B2B Address Book and PO Box Blocker Pro: common questions
- Is Extend B2B Address Book or PO Box Blocker Pro cheaper?
- Paid plans start at $49/month for Extend B2B Address Book and $2.99/month for PO Box Blocker Pro. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- Which has better reviews, Extend B2B Address Book or PO Box Blocker Pro?
- On the Shopify App Store: Extend B2B Address Book 5.0 from 2 reviews and PO Box Blocker Pro 1.0 from 1 reviews.
- 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 Oct 15, 2026 for Extend B2B Address Book, Nov 8, 2026 for PO Box Blocker Pro; 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 Oct 15, 2026 for Extend B2B Address Book, Nov 8, 2026 for PO Box Blocker Pro. 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.