At Once Inventory vs Inventory Man
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 At Once Inventory, Oct 13, 2026 for Inventory Man.
The short answer
- Paid plans start at $125/month for At Once Inventory and $3/month for Inventory Man.
- At Once Inventory lists 5 features Inventory Man’s listing doesn’t mention, including Barcodes, Import and export, Inventory sync.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Monthly Plan
- · CSV Import & Exports
- · Forecasting & low stock notifications
- · Inventory drift log from Shopify errors
- · Multi-location stock tracking
- · Purchase Orders & Receiving
- · Stock takes
Monthly
Yearly
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureAt Once gives Shopify merchants complete inventory control. Track stock live across all locations, manage your full product catalog, and create products with auto-generated SKUs and barcodes. Scan barcodes for stocktakes and receiving. Import and export via CSV, bulk edit variants, run detailed stocktakes, and transfer stock between locations. Purchase orders, returns, edits, and cancellations sync automatically.
Effortlessly manage your multi-location stores with the Multi-Location Inventory Insights app. This powerful tool gives store owners an intuitive way to track inventory across all locations, making it easier to manage stock, plan transfers, and optimize product performance. This is an absolute necessity for stores with multiple locations.
- Build and manage your full product catalog with auto-generated SKUs and barcodes
- Create purchase orders by location, scan to receive, and push stock to Shopify
- Adjust inventory across all locations in real time with bulk edit and CSV export
- Run multi-user stocktakes by location with barcode scanning and auto-save
- Get Location Level Inventory Levels of all variants of searched product
- Make Location-wise informed decisions on stock levels and replenishments.
- Easy stock transfer planning -See which variant is selling out at which location
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 |  At Once Inventory |  Inventory Man |
|---|---|---|
| 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 | At Once Inventory | Inventory Man |
|---|---|---|
| App Store rating | 5.0 ★ | Not published |
| App Store reviews | 1 | 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 | At Once Inventory | Inventory Man |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $125/month | $3/month(ahead) |
| Longest free trial | 14 days | 14 days |
| Plans listed | 1 | 2 |
Listing
| Measure | At Once Inventory | Inventory Man |
|---|---|---|
| Shopify category rank | #248(ahead) | #451 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Apr 30, 2026 | Feb 25, 2025 |
| Languages | 1 | 1 |
| Developer | At Once | The Metros Collective |
FAQ
At Once Inventory and Inventory Man: common questions
- Is At Once Inventory or Inventory Man cheaper?
- Paid plans start at $125/month for At Once Inventory and $3/month for Inventory Man. 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?
- At Once Inventory lists 5 the others don’t mention, such as Barcodes, Import and export, Inventory sync, Multi-location. Inventory Man lists 1 the others don’t mention, such as Inventory planning. 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 At Once Inventory, Oct 13, 2026 for Inventory Man; 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 At Once Inventory, Oct 13, 2026 for Inventory Man. 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.