Every supplier price sheet is a margin change you haven't noticed yet. CostGuard reads your true costs on Shopify, remembers every change, and mails you the fix — the exact price that restores your margin.
Get notified at launchUpload a supplier's CSV and CostGuard maps the columns itself — SKU, cost, currency, barcode. Every row is matched to your catalog through a four-tier cascade: exact SKU, barcode, the vendor's own SKU, then fuzzy title match for the stragglers. It remembers each vendor's layout, so the next sheet is one click.
Every cost change is written down with its source and effective date — nothing overwritten, ever. Delete a vendor, re-sync your catalog, change your mind: the history stays. Your record outlives the app.
Three rules watch your numbers: cost drift past your threshold, margin below your floor, and products with no cost set at all — your hidden profit blind spots. When a new sheet lands, one digest in your inbox shows each change and the exact price that restores your target margin, snapped to a clean .99.
CostGuard asks Shopify for read access only — there is no write permission in the app to misuse. Recommendations arrive as numbers you review and a CSV you can export, not silent edits to your store. You decide what ships.
Install it and your catalog syncs itself — variants, costs, prices — with no setup screen. A sensible drift rule is armed from day one; tune thresholds whenever you like.
CostGuard is in development for the Shopify App Store. Leave your email and be first in when it opens.