Alertr is a Shopify inventory app that tracks sell rates per SKU, predicts stockouts days in advance, and sends alerts with reorder quantities before you run out.
What is Alertr?
Alertr is an inventory management app for Shopify stores that calculates daily sell rates per product variant and forecasts days of stock remaining. It takes your Shopify product data and order history as input, then outputs a dashboard and alerts with reorder quantities. The app is built by AlertrNow and installs in one click from the Shopify App Store.
Key Features
- Daily inventory sync — Automatically pulls product data and recent orders from Shopify every day, calculates sell rates per SKU across your chosen lookback window.
- Smart reorder alerts — Delivers email or Slack notifications when a SKU is projected to run out within your supplier lead time window, including the exact number of units to reorder based on current sell rate.
- Inventory dashboard — Shows all SKUs in a single view with columns for current stock, sell rate per day, days left, and status (OK, Low, Out). Filter by Low Stock, Needs Reorder, or Out of Stock.
- CSV export — Download the full inventory report as a CSV, filtered and sorted as displayed, for purchase orders or external reporting.
- Configurable thresholds — Set your own lookback window (e.g., last 30 days of sales data), supplier lead time in days, and alert frequency per SKU.
- Slack integration — Receive reorder alerts directly in your team’s Slack channel without leaving your communication tools.
Who is it for?
- Shopify merchants managing 50+ SKUs — Those whose spreadsheet-based tracking has become a full-time job and want automated daily sell-rate calculations instead of manual updates.
- DTC brands with supplier lead times — Owners who need to factor in 2–4 week supplier turnaround and get alerts when stock will run out before the next shipment arrives.
- Stores that run paid ads on inventory — Merchants who risk ad spend on out-of-stock products and need real-time warnings to pause campaigns before inventory hits zero.
What can you do with Alertr?
- Prevent stockouts on fast-moving products — Alertr’s example shows Vitamin C Serum selling 8.7/day with 52 in stock and 6 days left; the app alerts you to reorder 174 units now, not when it hits zero.
- Plan reorders around supplier lead times — If a product like Citrus Grove Candle has 16 days left and supplier lead time is 14 days, Alertr flags it as “order today” — the alert is timed exactly to avoid a gap.
- Stop ads on out-of-stock items — When Gold Hoop Earrings hit 0 units (selling 4.1/day), Alertr fires an immediate out-of-stock alert so you can pause ad spend within minutes, not two days later.
How does it work?
Install from the Shopify App Store in one click. Set your supplier lead times and alert preferences (email, Slack, or both). Alertr immediately syncs product data and order history — no CSV uploads or manual entry. It then runs daily calculations and sends alerts when any SKU is projected to run out inside your lead time window, with the reorder quantity.
Pricing
Free tier for up to 50 SKUs includes the inventory dashboard and daily sync but no alerts or CSV export. Pro plan at $29/mo (14-day free trial) adds unlimited SKUs, email and Slack alerts, CSV export, and configurable thresholds. No credit card required for the trial.
FAQ
How is this different from Shopify’s built-in stock alerts?
Shopify’s stock alerts trigger at a static number (e.g., “alert at 10 units”), ignoring how fast a product sells. Alertr uses daily sell rate per SKU to calculate days of stock left and factors in supplier lead times, so you get the alert at the right moment — not after a bestseller has already sold out.
