PO Box Blocker Pro vs ShipShield
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 3, 2026 for PO Box Blocker Pro, Nov 2, 2026 for ShipShield.
The short answer
- Paid plans start at $2.99/month for PO Box Blocker Pro and $1.89/month for ShipShield.
Head to head
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
ShipShield Pro
- · Address rule simulator
- · Custom buyer error messages
- · Recipient phone number rule
- · US PO box blocking
- · Unlimited checkout address checks
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.
Many couriers can't deliver to PO boxes or need a recipient phone number to dispatch a parcel. Orders with these addresses lead to returned parcels, fulfillment delays and extra support work. ShipShield checks each shipping address in Shopify checkout and asks the buyer for a street address or phone number before the order is placed.
- 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.
- Block US PO Box addresses on shipping orders while allowing real street names.
- Require a recipient phone number on US shipping orders for courier dispatch.
- Test sample addresses in a built-in simulator before turning rules on.
- Write the message buyers see when their address needs fixing.
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 | |
|---|---|---|
| Detected stores | 2 | 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 | PO Box Blocker Pro | |
|---|---|---|
| App Store rating | 1.0 ★ | Not published |
| App Store reviews | 1 | Not published |
| 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 | |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $2.99/month | $1.89/month(ahead) |
| Longest free trial | 14 days | 7 days |
| Plans listed | 2 | 1 |
Listing
| Measure | PO Box Blocker Pro | |
|---|---|---|
| Shopify category rank | #247 | Not enough data |
| Shopify App Charts | #3 in Shipping solutions - Other | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Jul 4, 2025 | Nov 2, 2026 |
| Languages | 1 | 1 |
| Developer | Dev Kit | Southwood Marketing |
FAQ
PO Box Blocker Pro and ShipShield: common questions
- Is PO Box Blocker Pro or ShipShield cheaper?
- Paid plans start at $2.99/month for PO Box Blocker Pro and $1.89/month for ShipShield. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- 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 3, 2026 for PO Box Blocker Pro, Nov 2, 2026 for ShipShield; 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 3, 2026 for PO Box Blocker Pro, Nov 2, 2026 for ShipShield. 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.