AI-Powered Inventory Forecasting for Shopify

Click 'Install App' on this page or find Forthcast in the Shopify App Store. Authorize the app, and it will automatically sync your products and orders. Setup takes about 5-10 minutes depending on your store size.

Go to Settings > Email Alerts, toggle alerts on, and enter your email address. Forthcast sends daily alerts at 9 AM for items below their reorder point. Use 'Send Test Alert' to verify your setup.

From the Reorder Point report, click 'Add to PO' on items needing restock. Go to Purchase Orders, review quantities, select a supplier, and click 'Send to Supplier' to email the PO directly.

Go to Settings > Lead Times. Enter the number of days it takes for each SKU to arrive from your supplier. Forthcast uses this to calculate when to trigger reorder alerts.

Each report tab (Stock Projection, Reorder Point, Demand Forecast) has an 'Export CSV' button. Click it to download the data for use in spreadsheets or other tools.

Go to Settings > Suppliers and click 'Add Supplier'. Enter the supplier name, email, and optionally link specific SKUs. When creating purchase orders, you can email directly to linked suppliers.

Yes. Most inventory tools calculate your average selling rate using your full sales history, including months where you had zero sales because you had nothing to sell. This artificially lowers the baseline and leads to under-ordering. Forthcast excludes out-of-stock periods when calculating how fast a product actually sells, so your replenishment recommendations are based on real demand, not demand suppressed by the stockout itself.

Forthcast automatically detects seasonal patterns in your sales history and factors them into forecasts and reorder recommendations. If a product consistently slows down in certain months, the system recognises that as normal behaviour rather than a problem. This means fewer false alerts during predictable slow periods, and more accurate forward projections for products with strong seasonal demand.

Forthcast's engine breaks your sales history into three separate signals and tracks each one independently.

Baseline demand is the underlying average rate at which a product sells — stripped of any noise, spikes, or seasonal swings. Think of it as the floor the forecast is built on.

Trend is whether that baseline is moving up or down over time. A product growing 5% month-on-month has an upward trend; one that spiked during a promotion and has since declined has a downward one. The engine weights recent behaviour more heavily than old data, so a trend reversal gets picked up quickly rather than being diluted by months of history going the other way.

Seasonality is the repeating rhythm in demand — day-of-week patterns (weekends sell differently to weekdays), and for stores with longer sales history, annual cycles like a summer slowdown or a pre-Christmas peak. Once the engine has identified that rhythm, it applies it to every month of the forecast, so a product that always dips in February will show that dip even years into the future.

The three signals combine to produce each month's forecast. If one is weak or the data is too short to measure it reliably, the engine omits it rather than guessing, which is why short-history SKUs show a confidence indicator.

Forthcast can link a new product to an existing product with a similar sales pattern, inheriting its demand history to generate an immediate forecast. Alternatively, you can set a seed forecast manually, which the system uses until enough real sales data has accumulated to take over. New products are flagged clearly so you always know when a recommendation is based on limited data.

Yes. Each SKU has an optional minimum order quantity (MOQ) field you can set directly in the app. When Forthcast generates a purchase order, it respects that minimum, so if the recommended quantity falls below your MOQ it will be rounded up automatically. You can set or clear the MOQ at any time.

Yes. Forthcast tracks inventory levels across all your active Shopify locations and consolidates them into a single view. Reorder recommendations take stock at all locations into account, so you get an accurate picture of your total available inventory rather than looking at each location in isolation.

Safety stock is calculated per SKU based on your product's lead time and how much its demand varies week to week. Products with more variable demand carry a larger buffer to protect against unexpected spikes. You can override the calculated safety stock for any SKU directly in the app if you have specific requirements for a product.

Email us at info@forthcast.io and we will get back to you promptly. You can also reach us through the Shopify App Store listing. We are a small team and take support seriously, so you will always hear from a real person.