Shopify Flow (free)
Trigger: variant inventory changes. Condition: quantity <= threshold. Action: send email or Slack message.
Setup
- Install Shopify Flow (free)
- Create workflow
- Trigger: Inventory quantity changed
- Condition: <= 5 units
- Action: Email purchasing team
Per-variant threshold
Metafield 'Reorder threshold' per variant. Flow reads metafield + compares to inventory. Dynamic per SKU.
Apps
Stocky (POS Pro), Inventory Planner, Ordersify. All support automated alerts + reorder suggestions.
Frequently asked questions
How to set low-stock alerts for Shopify variants?
Shopify Flow: trigger on inventory change, condition on threshold, action send email.
Best threshold for low-stock alert?
Reorder point = velocity × lead time. Per variant. Typical: 5-20 units.
Free vs paid alert setup?
Shopify Flow: free, capable. Apps (Stocky, Inventory Planner): more features + reorder automation.
Slack alert for low stock?
Yes via Shopify Flow → Slack webhook.
Per-variant threshold?
Yes via metafield. Flow reads metafield per variant.
Alert frequency — every change or daily digest?
Configurable. Digest better for high-SKU stores (avoid alert fatigue).
Auto-reorder from alert?
Advanced — Flow can create draft PO or trigger app-based reorder.
Alerts for POD (unlimited inventory)?
Not needed — virtual inventory. Only for physical stock.
Related reading
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