---
title: "Margin Defender: Block Coupons Shopify App Profile"
description: "Ever run a 20% off Black Friday sale, only to realise a customer used it on a premium product with a 10% margin? Margin Defender is your failsafe\\! Margin Defender prevents you from accidentally discounting premium items that should never be on sale. Simply tag specific products as \"protected,\" and this app will block checkout if any discount code is applied while those items are in the cart. Designed to be the simplest, most efficient way to protect your bottom line from unintended discounts."
canonical_url: "https://shoplist.co/shopify-apps/margin-defender"
markdown_url: "https://shoplist.co/shopify-apps/margin-defender.md"
last_updated: "2026-11-09"
entity_type: "shopify_app"
slug: "margin-defender"
source: "public Shopify app profile allowlist"
---

# Margin Defender: Block Coupons Shopify App Profile

> Ever run a 20% off Black Friday sale, only to realise a customer used it on a premium product with a 10% margin? Margin Defender is your failsafe\! Margin Defender prevents you from accidentally discounting premium items that should never be on sale. Simply tag specific products as "protected," and this app will block checkout if any discount code is applied while those items are in the cart. Designed to be the simplest, most efficient way to protect your bottom line from unintended discounts.

## Quick answer
Margin Defender: Block Coupons has 0 detected stores in Shoplist. This Markdown profile displays 0 public brand examples; it is not a complete customer list.

## Key facts
- Name: Margin Defender: Block Coupons
- Monitoring status: Storefront detection limited
- Developer: CosModo
- Developer profile: https://shoplist.co/app-developers/cosmodo
- Shopify App Store URL: https://apps.shopify.com/margin-defender
- Launch date: March 11, 2026
- Shoplist category: Checkout - Other
- Free trial signal: Yes

## Pricing summary
Product Protection: $5.99/month

Shoplist has not yet found reliable public storefront evidence connecting a Shopify store to this app. This does not mean the app has no users. Some apps are new, admin-only, server-side, theme-independent, or otherwise difficult to detect from public storefront signals.


## App Signals
As of November 9, 2026:

- Stores running it: 0, 0.0% of the stores Shoplist tracks
- Store movement, last 28 days: +0 new stores, +0 returning, −0 removed, net 0 (estimated; 2 days held out of movement)
- Primary App Store category: Discounts, #757 (14-day median position)
- Listing reviews: 0

## Public callouts
- Exclude specific products from store-wide sales so you never sell at a loss
- Automatically block checkout if a protected item has a discount applied.
- Works seamlessly with both discount codes and automatic promotions.
- Failsafe design ensures checkout always works, even if validation times out.
## Shopify App Store categories
- Checkout - Other
- Discounts

## Data note
Profile updated: November 9, 2026. This is the profile revision date, not a guarantee that every store was checked on that date.
Public snapshot built: 2026-11-09 12:22:47.684409\+00
Detection metrics refreshed: 2026-11-09 10:00:00.198215\+00
Public app evidence date: 2026-11-09 01:15:01.300871\+00
This generated Markdown profile intentionally exposes only public, stable app-profile fields and a small public app-stack sample from Shoplist. It excludes private contact data, people data, internal scores, crawl provenance, full datasets, and unstable operational fields.

## Related links
- [HTML app profile](https://shoplist.co/shopify-apps/margin-defender)
- [Shopify apps directory](https://shoplist.co/shopify-apps)
- [Shoplist data methodology](https://shoplist.co/data-methodology.md)