Detected Sep 17, 2026

Pricing optimization & DiscountsBy Arcanum HollowsLaunched September 14, 2026Updated September 17, 2026
Arcanum Margin Keep launched on September 14, 2026. Shoplist is watching for its first storefront installs and tracking pricing and listing changes in the meantime.
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Store movement comes from Sonar's storefront scans; listing changes come from the Shopify App Store page.
App Store listing
Detected Sep 17, 2026
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Apps merchants weigh against Arcanum Margin Keep, with their own detected stores and ratings.
Keep promotions profitable after costs. Spot bad sale prices and codes before they wipe your margin.
Margin Keep is campaign insurance for promotions. Scan discount codes and sale prices against your profit floor after costs and fees—with known, estimated, or missing cost labels. Safety Studio lets you try a discount or sale price before go-live and see safer options. The decision ledger shows which orders to watch. Protect adds peak-sale floors, Slack/Teams alerts, and Admin pause. Optional Block stops checkout only when costs are trustworthy; incomplete costs never block a sale.
Every number on this page comes from public storefront scans and the public Shopify App Store listing. If Shoplist shows Arcanum Margin Keep on a store, it is there.
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Developer
Every app Arcanum Hollows publishes, with their detected reach.
Rankings
The ten apps gaining the most detected installs in each category.
Directory
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