Meridian Checkout Blocker vs modlet: Block PO Box & Lockers
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 24, 2026 for Meridian Checkout Blocker, Oct 31, 2026 for modlet.
The short answer
- Both list a free plan. Paid plans start at $3.99/month for Meridian Checkout Blocker and $7.99/month for modlet.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · For development stores
Basic
- · Address & zip/postal code validation
- · Custom Email Domain Blocker
- · Disposable email validation
- · Modifiable Block/Warning Messages
- · Non-Contiguous US region Blocker
- · PO Box Blocker
Pro
- · Everything from Basic plan
- · Freight Forwarder Blocker
- · Landline phone detection
- · Military Address Blocker
Free
- · Address Simulator & Testing Tool
- · Block PO Boxes globally (Instant setup)
- · Native & Secure Checkout Validation
- · Up to 250 Store Orders per Month
Pro
- · Country & Region Whitelisting
- · Custom Error Messages & Translations
- · Granular Pattern Rules
- · Product Exemptions
- · Shipping Method Filtering
- · Unlimited Orders & Address Validations
Enterprise
- · 1-on-1 Workflow & Strategy Configuration
- · Dedicated Technical Account Manager
- · Guaranteed Custom SLA & Compliance Help
- · On-Demand Custom Data Exports & Reports
- · Priority Custom Feature Development
- · White-Glove Setup & Dedicated Onboarding
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCheckout Shield eliminates costly delivery errors and customer service headaches by validating orders before checkout completes. By blocking PO boxes, disposable emails, and landline phone numbers, merchants instantly avoid return-to-sender fees and bounced communications. Our integration only collects accurate, actionable data.
Protect your shipping margins with reliable, global PO Box blocking. Built natively into Shopify Checkout, it physically blocks checkout completion for restricted addresses—ensuring 100% reliability. Why offer a generous free tier? Built by a veteran cloud architect, our highly efficient infrastructure keeps costs low, and we love helping new stores get off the ground.
- Blocks customers from checkout on disposable email.
- Option to block PO boxes & validate address including postal/zip codes.
- Warns customers that shipping updates will not be received on landline phones.
- Allows freedom to enable / disable validations.
- Block PO Boxes, Lockers, and Military Addresses to prevent failed deliveries.
- Stop expensive UPS/FedEx carrier return fees instantly.
- Native Shopify Checkout integration—unhackable with zero theme code.
- Exempt specific countries or shipping methods from blocking rules.
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 |  Meridian Checkout Blocker |  modlet |
|---|---|---|
| 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 | Meridian Checkout Blocker | modlet |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 2 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Meridian Checkout Blocker | modlet |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $3.99/month(ahead) | $7.99/month |
| Longest free trial | 3 days | 30 days |
| Plans listed | 3 | 3 |
Listing
| Measure | Meridian Checkout Blocker | modlet |
|---|---|---|
| Shopify category rank | #209 | #67(ahead) |
| Shopify App Charts | #12 on Pricing moves in Checkout - Other | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Aug 28, 2026 | Mar 9, 2026 |
| Languages | 1 | 1 |
| Developer | Meridian Code | modlet |
FAQ
Meridian Checkout Blocker and modlet: common questions
- Is Meridian Checkout Blocker or modlet cheaper?
- Both list a free plan. Paid plans start at $3.99/month for Meridian Checkout Blocker and $7.99/month for modlet. 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 Oct 24, 2026 for Meridian Checkout Blocker, Oct 31, 2026 for modlet; 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 24, 2026 for Meridian Checkout Blocker, Oct 31, 2026 for modlet. 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.