Keystone Inventory vs Supremo: Inventory Management
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026 for Keystone Inventory, Nov 1, 2026 for Supremo.
The short answer
- Only Supremo lists a free plan. Paid plans start at $29/month for Keystone Inventory and $19/month for Supremo.
- Supremo lists 16 features Keystone Inventory’s listing doesn’t mention, including Automated alerts, Automatic, Backorders.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Light
- · Full Inventory Forecasting
- · Up to 500 Products
Business
- · Custom Bundles
- · Full Inventory Management
- · Inventory Forecasting
- · Reporting
- · Stock Control
- · Up to 1000 Products
Professional
- · Custom Product Bundles
- · Full Inventory Management
- · Integrated Stock Taking
- · Inventory Forecasting
- · Reporting
- · Stock Control
Shop
- · Auto-calculate reorder points per SKU
- · Create & send purchase orders to vendors
- · Create pick lists & track short picks
- · Manage supplier , lead times & contacts
- · Real-time inventory sync from Shopify
- · Reconcile supplier invoices with POs
Shelf
- · Auto-calculate reorder points per SKU
- · Create & send purchase orders to vendors
- · Create pick lists & track short picks
- · Manage vendors, lead times & contacts
- · Real-time inventory sync from Shopify
- · Reconcile supplier invoices with POs
Warehouse
- · Auto-calculate reorder points per SKU
- · Create & send purchase orders to vendors
- · Create pick lists & track short picks
- · Manage vendors, lead times & contacts
- · Real-time inventory sync from Shopify
- · Reconcile supplier invoices with POs
Universe
- · Auto-calculate reorder points per SKU
- · Create & send purchase orders to vendors
- · Create pick lists & track short picks
- · Manage vendors, lead times & contacts
- · Real-time inventory sync from Shopify
- · Reconcile supplier invoices with POs
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureKeystone Inventory turns your Shopify sales data into clear ordering decisions. It tracks how fast each product sells, factors in your supplier lead times, case packs and safety stock, and tells you exactly what to reorder and when — before you run out, without tying up cash in overstock. When it's time to order, select the products and Keystone builds purchase orders grouped by supplier.
Supremo connects inventory management, replenishment, purchase orders & warehouse operations for Shopify. Use demand forecasting, sales velocity, lead times, safety stock & reorder points to plan what to buy, when & how much. Automatically create purchase orders at reorder points for review & sending to suppliers, or create them in bulk.
- Keep your best sellers in stock.
- Purchase orders — create, authorise, send, receive with Shopify stock push-back
- Your whole inventory at a glance
- Demand forecasting — reorder points, days of cover, suggested quantities
- Auto Reordering: Calculates reorder points (ROP) and EOQ-based order quantities
- Purchase Orders: Create POs from forecasts, receive & sync stock to Shopify
- Low Stock Alerts: Instant or scheduled notifications via email or Slack
- Inventory Dashboard: Reorder dates, quantities & velocity by 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 |  Keystone Inventory |  Supremo |
|---|---|---|
| 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 | Keystone Inventory | Supremo |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 7 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Keystone Inventory | Supremo |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | $29/month | $19/month(ahead) |
| Longest free trial | 14 days | 14 days |
| Plans listed | 3 | 4 |
Listing
| Measure | Keystone Inventory | Supremo |
|---|---|---|
| Shopify category rank | #392 | #60(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Jun 29, 2026 | Jun 22, 2026 |
| Languages | 1 | 1 |
| Developer | Keystone Solutions | Sixthshop |
FAQ
Keystone Inventory and Supremo: common questions
- Is Keystone Inventory or Supremo cheaper?
- Only Supremo lists a free plan. Paid plans start at $29/month for Keystone Inventory and $19/month for Supremo. 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?
- Keystone Inventory lists 4 the others don’t mention, such as Custom reports, Insights, Inventory sync, Threshold alerts. Supremo lists 16 the others don’t mention, such as Automated alerts, Automatic, Backorders, Data import and export. 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 13, 2026 for Keystone Inventory, Nov 1, 2026 for Supremo; 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 13, 2026 for Keystone Inventory, Nov 1, 2026 for Supremo. 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.