Simmer: Food Service/Cafe POS
Helps food service businesses track tickets, product modifiers, kitchen displays...
PopUp ‑ Sell by Weight
Sell by weight or item. On-device catalog, no Square needed.
by Mad Valley Productions · Launched: May 2026 · Free plan available.
Built for Shopify
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About PopUp ‑ Sell by Weight
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. 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 Show more Show less
Last verified: July 22, 2026 · Fresh
App details
- Developer
- Mad Valley Productions
- Category
- Marketing & conversion
- Pricing
- Free plan available
- Launched
- May 2026
- Rating
- 0.0 on Shopify
Key features
- Up to 5 products
- No credit card required - never expires
- Unlimited products
- Categories
- Photo uploads for thumbnails
Shopify Admin, Shopify POS
3 plans · starts free
Free
Free
Season-Pass
$4.99/month
Annual
$30/year
Plans and prices as listed on the Shopify App Store.
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