StockPing

Low-stock alerts for your Shopify store. Set a threshold once, get one message when variants drop below it, and a reorder list by vendor every morning.

Install from the Shopify App Store

Already installed? Open Apps › StockPing in your Shopify admin.

One message, not twenty. Alerts are batched, and a variant hovering at the threshold alerts once a day, not on every sale.
Per-variant control. A store-wide threshold with overrides and exclusions per variant. No tagging.
You can see it working. The dashboard shows the last inventory update received and the last alert sent. Every message is logged.
Email, Slack, or Discord. Paste a webhook URL; no extra apps to approve.