Start with a browser-local diagnosis. Pay monthly only when the problem actually repeats and deserves monitoring. No Shopify Admin password, Google Merchant token or ad account is required by these free tools.
Google Merchant Center · catalog health
Paste a Merchant Center-style CSV or TSV export and catch missing core fields, duplicate IDs, invalid availability values, malformed prices and identifier gaps entirely in your browser.
Shopify · variants · catalog operations
Paste a Shopify product CSV export and flag missing handles, missing variant prices, duplicate SKUs, option-name/value mismatches and weak identifier coverage without uploading store data.
Ecommerce · paid acquisition · unit economics
Calculate contribution margin, break-even return on ad spend and maximum break-even customer acquisition cost from your own price, product cost, fulfilment, payment fee and refund assumptions.
Ecommerce · returns · retention
Estimate revenue at risk, direct handling cost and potential exchange-recovery value per 100 orders from your own return rate, order value, label cost and processing assumptions.
Shopify · inventory · low-stock alerts
Estimate days until stockout, a lead-time-aware reorder point and a target replenishment quantity from current inventory, average daily sales, lead time and safety stock.
Ecommerce · discounts · contribution margin
Calculate the minimum safe sale price and maximum discount percentage for a target contribution margin after product cost, fulfilment and payment processing assumptions.
Shopify · bulk editing · price safety
Paste a price-change CSV and flag rows where a proposed new price is non-positive or falls below a contribution-margin floor before you apply a bulk catalog edit.
Commercial rule
The free utilities stay useful without payment. Existing recurring software is offered only where Solarc can deliver a repeated monitoring loop. This avoids the common ecommerce-app failure mode where a tiny one-off feature becomes another permanent monthly bill.