PO Box Blocker Pro vs PostRules
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 8, 2026 for PO Box Blocker Pro, Nov 7, 2026 for PostRules.
The short answer
- On the Shopify App Store: PO Box Blocker Pro 1.0 from 1 reviews and PostRules 5.0 from 3 reviews.
- Paid plans start at $2.99/month for PO Box Blocker Pro and $15/month for PostRules.
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.
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
All Access
- · Everything included
- · Unlimited Rules
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featurePO 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.
PostRules lets merchants create rules that filter shipping rates at checkout based on a customer's postcode. Show mode restricts postcodes to specific shipping methods. E.g. Only show rural delivery options to rural postcodes or block mode prevents customers placing orders from postcodes you can't deliver to. Everything is configured within the app's dashboard.
- 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.
- Filter shipping rates by postcode; show or block at checkout.
- Built-in postcode presets for common regions like NZ rural areas
- Draft and active states let you prepare rules before going live.
- Stale rate detection alerts you when Shopify shipping rates change.
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 |  PO Box Blocker Pro |  PostRules |
|---|---|---|
| Detected stores | 3 | 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 | Home & Garden, Business & Industrial | Not published |
| Top store countries | Canada, United States | Not published |
Reviews
| Measure | PO Box Blocker Pro | PostRules |
|---|---|---|
| App Store rating | 1.0 ★ | 5.0 ★(ahead) |
| App Store reviews | 1 | 3(ahead) |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | PO Box Blocker Pro | PostRules |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $2.99/month(ahead) | $15/month |
| Longest free trial | 14 days | 7 days |
| Plans listed | 2 | 1 |
Listing
| Measure | PO Box Blocker Pro | PostRules |
|---|---|---|
| Shopify category rank | #276 | #65(ahead) |
| Shopify App Charts | #3 in Shipping solutions - Other | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Jul 4, 2025 | May 1, 2026 |
| Languages | 1 | 1 |
| Developer | Dev Kit | Subject Matter |
FAQ
PO Box Blocker Pro and PostRules: common questions
- Is PO Box Blocker Pro or PostRules cheaper?
- Paid plans start at $2.99/month for PO Box Blocker Pro and $15/month for PostRules. 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, PO Box Blocker Pro or PostRules?
- On the Shopify App Store: PO Box Blocker Pro 1.0 from 1 reviews and PostRules 5.0 from 3 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 Nov 8, 2026 for PO Box Blocker Pro, Nov 7, 2026 for PostRules; 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 8, 2026 for PO Box Blocker Pro, Nov 7, 2026 for PostRules. 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.