Reorder Radar ‑ stop stockouts vs StockDays: Low Stock Alerts
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 Reorder Radar, Oct 14, 2026 for StockDays.
The short answer
- Both list a free plan. Paid plans start at $49/month for Reorder Radar and $9.99/month for StockDays.
- Reorder Radar lists 4 features StockDays’s listing doesn’t mention, including Inventory tracking, Replenishment reminders, Restock notifications.
Head to head
Reorder Radar Free
Reorder Radar Pro
- · Priority support
- · Unlimited products
- · Weekly Monday email digest
Free
- · Email alerts
- · Manual thresholds
- · Up to 50 variants
Growth
- · Bulk thresholds
- · Sell-out forecasting
- · Slack alerts
- · Up to 1,000 variants
Pro
- · CSV export
- · Reorder suggestions
- · Unlimited variants
- · Weekly digest
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureMost merchants don't run out of best-sellers because they forget. They run out because they couldn't tell which product needed attention first. Reorder Radar solves this by calculating a single metric for every SKU: profit at risk. It syncs your products, orders, and inventory automatically, measures sales velocity, forecasts stockout dates, and recommends exactly how many units to reorder and by when.
Running out of stock quietly costs revenue every week. StockDays tracks the inventory level of every product variant in your store and sends an alert the moment a variant crosses your low stock threshold, so you can reorder before the shelf is empty. It also estimates how many days of stock you have left based on recent sales velocity, and suggests a reorder date that accounts for your supplier lead time.
- Profit-at-risk ranking shows which reorders protect the most revenue
- Stockout forecasts with reorder quantities and order-by deadlines
- Automatic sync of products, orders, and inventory via webhooks
- Weekly Monday email digest of your top reorder priorities
- Low stock alerts sent the moment a variant crosses your threshold
- Sell out forecasting that estimates days of stock left from sales velocity
- Reorder dates calculated from your supplier lead time
- Per variant thresholds, with muting for products you do not want to track
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 |  Reorder Radar |  StockDays |
|---|---|---|
| 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 | Reorder Radar | StockDays |
|---|---|---|
| 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 | Reorder Radar | StockDays |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $49/month | $9.99/month(ahead) |
| Longest free trial | Not listed | 14 days |
| Plans listed | 2 | 3 |
Listing
| Measure | Reorder Radar | StockDays |
|---|---|---|
| Shopify category rank | #678 | #493(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Mar 13, 2026 | Aug 31, 2026 |
| Languages | 1 | 1 |
| Developer | Happy Software | Michiakari |
FAQ
Reorder Radar and StockDays: common questions
- Is Reorder Radar or StockDays cheaper?
- Both list a free plan. Paid plans start at $49/month for Reorder Radar and $9.99/month for StockDays. 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?
- Reorder Radar lists 4 the others don’t mention, such as Inventory tracking, Replenishment reminders, Restock notifications, Threshold alerts. StockDays lists 1 the others don’t mention, such as Email notifications. 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 Reorder Radar, Oct 14, 2026 for StockDays; 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 Reorder Radar, Oct 14, 2026 for StockDays. 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.