Missing Cost Audit vs CostSonar
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 14, 2026 for Missing Cost Audit, Nov 9, 2026 for CostSonar.
The short answer
- Only Missing Cost Audit lists a free plan.
- CostSonar lists 1 features Missing Cost Audit’s listing doesn’t mention, including Custom reports.
Head to head
Free
- · CSV export, no SKU limit ever
- · Finds every variant with no cost
- · Ranks the gaps by revenue distorted
- · Sales and catalogue coverage
Keep
- · Alerts and nightly email digests
- · Import your cost history
- · Margin as a range, not a guess
- · Set costs in the app
- · Set one cost for a whole product
- · Verified, estimated, unknown per sale
Pro
- · Auto-restore cleared costs
- · Compares each price list to the last
- · Cost drift: what changed, by whom
- · Everything in Keep
- · Full order history, not just 60 days
- · Landed cost by SKU over time
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureWhen a product has no cost per item, Shopify reports that cost as $0.00 and books the whole sale as profit. It does not warn you. On a store where half the catalogue is missing costs, Shopify's own AI calls the margin "healthy". Free, forever, no SKU limit: find every variant with no cost, see how much recent revenue has none behind it, and export the list.
Shopify keeps one cost per inventory item. When you change it, the old value is replaced, so earlier margins stop matching. CostSonar records cost changes from its first check and keeps a dated history. It sorts your catalogue into variants selling below cost, variants with no cost set, and variants on a thin margin. Archived and draft products are skipped. Access is read-only. The app never writes to your store.
- Finds every product variant with no cost recorded, in seconds
- Ranks gaps by impact, so you fix the few that matter, not all of them
- Never asks for your customers' names, emails, phones or addresses
- See the variants selling below cost, biggest loss per unit first
- Get an email when a product that was making money starts losing it
- Keep a dated record of cost changes from your first check
- Find products with no cost set, which profit reports cannot include
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 |  Missing Cost Audit | |
|---|---|---|
| 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 | Missing Cost Audit | |
|---|---|---|
| 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 | Missing Cost Audit | |
|---|---|---|
| Free plan | Yes | Not listed |
| Lowest paid monthly plan | $29/month | No monthly plan listed |
| Longest free trial | Not listed | Not listed |
| Plans listed | 3 | Not published |
Listing
| Measure | Missing Cost Audit | |
|---|---|---|
| Shopify category rank | #1356 | 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 21, 2026 | Oct 14, 2026 |
| Languages | 1 | 1 |
| Developer | Kelbra Business Solutions LLC | Marimon Apps |
FAQ
Missing Cost Audit and CostSonar: common questions
- Is Missing Cost Audit or CostSonar cheaper?
- Only Missing Cost Audit 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?
- CostSonar lists 1 the others don’t mention, such as Custom reports. 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 14, 2026 for Missing Cost Audit, Nov 9, 2026 for CostSonar; 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 for Missing Cost Audit, Nov 9, 2026 for CostSonar. 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.