withly

Shopify app · Order limits

Withly Cart Rules

Stop partial-case and undersized orders at checkout, and reward buyers who order more of each item.

Selling by the case is hard when buyers can check out with one unit. Withly Cart Rules lets you set a minimum order quantity and a case-pack multiple for a whole product or a single variant. Shopify checkout blocks a cart line that does not meet the rule and shows a message that names the item. Optional quantity tiers give a qualifying line the highest matching percentage off. You can preview the result for any quantity before you save. The app is free.

Install on Shopify (opens in a new tab)FAQ
Withly Cart Rules home with total, active and draft rule counts and a getting-started checklist
Withly Cart Rules home with total, active and draft rule counts and a getting-started checklist
Pricing
Free
Category
Order limits
Launched
November 1, 2026

See the app

  • Withly Cart Rules rule editor setting minimum order quantity, case-pack multiple and volume discount tiers
  • Buyer outcome preview showing a blocked checkout for quantity 5 and an allowed checkout with 15% off for quantity 6
  • Shopify checkout blocked by Withly Cart Rules when Vitamin C Brightening Serum is not ordered in multiples of 2

Features

  • Minimum order quantity

    Block checkout when a cart line is below your minimum order quantity.

  • Case-pack multiples

    Require each cart line to be an exact multiple of your case-pack size.

  • Volume tiers

    Give the highest matching percentage discount for quantity tiers.

  • Apply each rule to a whole product or to one specific variant

  • Preview the checkout result for any quantity before saving a rule

Help and legal

Find answers about minimums, case packs, volume tiers, and how Withly Cart Rules handles data.