Duty Diligence: Landed Cost vs Margin Sentinel
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 14, 2026.
The short answer
- Both list a free plan. Paid plans start at $19/month for Duty Diligence and $15/month for Margin Sentinel.
- Duty Diligence and Margin Sentinel list the same 1 features.
Head to head
Free
- · Coverage report across your catalogue
- · Duty across your catalogue, by origin
- · Landed cost and margin per variant
- · The working behind every rate
- · Updated twice a day, automatically
Monitoring
- · 30 days of rate changes, with a CSV
- · Advance warning on dated duty changes
- · Duty per unit before and after a change
- · Priority support
- · Which products changed and by how much
Free
- · Export a fix list
- · Find missing unit costs
- · Scan up to 100 variants
Starter
- · Import supplier costs by CSV
- · Minimum price, what-if and alerts
- · Scan up to 5,000 variants
Growth
- · Import supplier costs by CSV
- · Minimum price and what-if checks
- · Scan up to 25,000 variants
- · Weekly alerts and priority support
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureDuty Diligence works out the landed cost of every product after US import duty and the margin it leaves you, from the cost, HS code and country of origin already on your products. There is nothing to look up and nothing to maintain. It reads the US tariff schedule twice a day, leaves out the duties that are still listed but no longer charged and tells you before a dated change reaches your products.
Open Margin Sentinel once and it automatically checks up to 100 Shopify variants using current price, unit cost, and inventory. See the exact SKUs with missing costs, negative gross margin, or prices below your target, plus what to fix first. Free includes cost repair, one guided supplier CSV import, discount scenarios, and fix-list export. No card, order data, or automatic changes.
- Coverage report: which variants can be checked and which fields are missing
- Margin snapshot: price, cost, effective duty and landed margin per variant
- Twice-daily re-verification against USITC, CBP and Federal Register sources
- Changed-rate flags when a tariff action moves your numbers
- Variant scan finds margin leaks and highlights issues like missing data.
- Supplier data templates and CSV imports to fill missing variant information.
- Scenario analysis to model catalog changes and measure impact on margins.
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 |  Duty Diligence |  Margin Sentinel |
|---|---|---|
| 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 | Duty Diligence | Margin Sentinel |
|---|---|---|
| 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 | Duty Diligence | Margin Sentinel |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $19/month | $15/month(ahead) |
| Longest free trial | Not listed | 14 days |
| Plans listed | 2 | 3 |
Listing
| Measure | Duty Diligence | Margin Sentinel |
|---|---|---|
| Shopify category rank | #1620 | #367 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Jul 24, 2026 | Jun 22, 2026 |
| Languages | 1 | 1 |
| Developer | In The Park Consulting Limited | Profit Guard |
FAQ
Duty Diligence and Margin Sentinel: common questions
- Is Duty Diligence or Margin Sentinel cheaper?
- Both list a free plan. Paid plans start at $19/month for Duty Diligence and $15/month for Margin Sentinel. 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 14, 2026; 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 14, 2026. 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.