
Selling in person - OtherBy Mad Valley ProductionsLaunched May 27, 2026Updated June 8, 2026
PopUp ‑ Sell by Weight launched on May 27, 2026. Shoplist is watching for its first storefront installs and tracking pricing in the meantime.
Apps merchants weigh against PopUp ‑ Sell by Weight, with their own detected stores and ratings.
Get alerted on first storefront installs, review spikes, pricing changes, and listing edits.

Popups, Banners, Free Shipping Bar, Exit Intent, Emails & SMS

Sales Pop-Up & Recent Sales Popup for Social Proof


Upsell and countdown popup, newsletter signup, exit pop up

Free Shipping Bar, Rotating Bars, Countdown, Email Sign Up, AI

Live Sales notifications. Sales pop up for Social Proof.
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.
Every number on this page comes from public storefront scans and the public Shopify App Store listing. If Shoplist shows PopUp ‑ Sell by Weight on a store, it is there.
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Every app Mad Valley Productions publishes, with their detected reach.
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