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PopUp ‑ Sell by Weight logo

PopUp ‑ Sell by Weight

Develop by Mad Valley Productions

$4.99-$30

/ Month
Free plan available

"Add weight-based sales to Shopify POS, seamless and offline-ready."

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About PopUp ‑ Sell by Weight

Launched May 26, 2026

Categories

Selling in person - Other

Built by Mad Valley Productions

Address

PO Box 10345, Bainbridge Island, WA, 98110, US

Website Privacy policy Document
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Introduction Video

Description

Weight-based selling for market vendors, simple separate catalog - pause when the season ends.

Shopify POS can't sell by weight. So like most market vendors, I ran two systems — Square for in-person, Shopify for everything else. Two catalogs, two logins, manual reconciliation every tax quarter. I built PopUp because I needed it. PopUp adds weight-based selling to Shopify POS. Mix weight and flat-price items in the same cart. On-device catalog, no Shopify inventory needed, works offline. Pause between seasons, no data lost.

Shopify POS can't sell by weight. So like most market vendors, I ran two systems — Square for in-person, Shopify for everything else. Two catalogs, two logins, manual reconciliation every tax quarter. I built PopUp because I needed it. PopUp adds weight-based selling to Shopify POS. Mix weight and flat-price items in the same cart. On-device catalog, no Shopify inventory needed, works offline. Pause between seasons, no data lost. more
  • Sell by weight or by item — price calculates instantly at the point of sale
  • Catalog stored on the device — opens instantly, no fetching data delays
  • Simple catalog with no inventory required, works alongside Shopify
  • Mix market items and existing store products in the same transaction
  • Pause between seasons — your catalog data is waiting when you return

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