Margin Defender: Block Coupons vs Structa Discount Blocker
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 9, 2026 for Margin Defender, Oct 17, 2026 for Structa Discount Blocker.
The short answer
- Only Structa Discount Blocker lists a free plan. Paid plans start at $5.99/month for Margin Defender and $9/month for Structa Discount Blocker.
- Structa Discount Blocker lists 2 features Margin Defender’s listing doesn’t mention, including Geolocation, Triggers and rules.
Head to head
Product Protection
Free
- · Core blocking features
- · Create 1 active rule
Pro
- · Priority support
- · Unlimited rules
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureEver 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.
Structa gives you precise control over Shopify discount codes. Set rules to block double discounts on sale items, require minimum spend on full-price products, exclude specific products or brands, or restrict codes by region.
- 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.
- Block codes on sale items or create sale-only discounts to control margin impact
- Set cart minimums on full-price items only - prevent threshold gaming with sales
- Geographic restrictions by country - segment regional campaigns
- Show customers clear messages explaining why codes don't apply, reduce confusion
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 |  Margin Defender |  Structa Discount Blocker |
|---|---|---|
| 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 | Margin Defender | Structa Discount Blocker |
|---|---|---|
| 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 | Margin Defender | Structa Discount Blocker |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | $5.99/month(ahead) | $9/month |
| Longest free trial | 7 days | 3 days |
| Plans listed | 1 | 2 |
Listing
| Measure | Margin Defender | Structa Discount Blocker |
|---|---|---|
| Shopify category rank | #757 | #277(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Mar 11, 2026 | May 4, 2026 |
| Languages | 1 | 1 |
| Developer | CosModo | taksh.codes |
FAQ
Margin Defender and Structa Discount Blocker: common questions
- Is Margin Defender or Structa Discount Blocker cheaper?
- Only Structa Discount Blocker lists a free plan. Paid plans start at $5.99/month for Margin Defender and $9/month for Structa Discount Blocker. 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?
- Margin Defender lists 1 the others don’t mention, such as Filtering. Structa Discount Blocker lists 2 the others don’t mention, such as Geolocation, Triggers and 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 Nov 9, 2026 for Margin Defender, Oct 17, 2026 for Structa Discount Blocker; 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 9, 2026 for Margin Defender, Oct 17, 2026 for Structa Discount Blocker. 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.