NJE: Address Validator vs PO Box Shipping Carrier Guard
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026 for NJE, Nov 11, 2026 for PO Box Shipping Carrier Guard.
The short answer
- Only NJE lists a free plan.
- NJE lists 4 features PO Box Shipping Carrier Guard’s listing doesn’t mention, including Email notifications, Label customization, Order sync.
Head to head
Free
- · 100 validations/month
- · Checkout widget, Thank you page widget
- · USA address validation, carrier-verified
Starter Plan
- · 1,000 validations/month
- · Analytics dashboard
- · Checkout widget, Thank you page widget
- · Email notifications
- · Order tagging
- · Overage at just $0.03/validation
Pro Plan
- · 10,000 validations/month
- · Analytics dashboard
- · Checkout widget, Thank you page widget
- · Email notifications
- · Order tagging
- · Overage at $0.02/validation
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureA meaningful share of failed deliveries trace back to address errors at checkout. Shipping Address Validator checks addresses at checkout and again on the Thank You page after the order is placed, flagging anything a carrier could fail to deliver. Customers get a one-click suggested correction at either point.
UPS, FedEx, DHL and other couriers can't deliver to PO boxes, so those orders bounce back or need a costly fix. PO Box Shipping Carrier Guard checks the address at checkout and asks for a street address when the chosen shipping option can't reach a PO box. Choose which of your shipping options go by mail, like USPS, and customers can still use a PO box with those. Prefer no PO boxes at all? Block them everywhere.
- Real-time carrier-verified address checking at checkout and again post-checkout
- Automatic order tagging and validation history for merchants
- One-click address correction for customers at checkout and post checkout
- Blocks PO box addresses at checkout for courier shipping options
- Allows PO boxes with USPS and other mail services you choose
- Finds your shipping rates and suggests which ones ship by mail
- Block all PO boxes or allow them everywhere with one setting
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 |  NJE | |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | Not enough data |
| 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 | NJE | |
|---|---|---|
| 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 |
Pricing
| Measure | NJE | |
|---|---|---|
| Free plan | Yes | Not listed |
| Lowest paid monthly plan | $9/month | No monthly plan listed |
| Longest free trial | Not listed | Not listed |
| Plans listed | 3 | Not published |
Listing
| Measure | NJE | |
|---|---|---|
| Shopify category rank | #1121 | Not enough data |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Sep 3, 2026 | Nov 11, 2026 |
| Languages | 1 | 1 |
| Developer | NJ E-COMMERCE SOLUTIONS | David Warwick |
FAQ
NJE and PO Box Shipping Carrier Guard: common questions
- Is NJE or PO Box Shipping Carrier Guard cheaper?
- Only NJE lists a free plan. 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?
- NJE lists 4 the others don’t mention, such as Email notifications, Label customization, Order sync, Order updates. PO Box Shipping Carrier Guard lists 1 the others don’t mention, such as Shipping rules. 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 Oct 13, 2026 for NJE, Nov 11, 2026 for PO Box Shipping Carrier Guard; 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 13, 2026 for NJE, Nov 11, 2026 for PO Box Shipping Carrier Guard. 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.