Seeking multibuy apps for repeat purchase discounts on a collection?

Topic summary

Seeking a Shopify app that offers repeat purchase discounts tied to a specific collection (group of related products). The discount should increase with each subsequent order from that collection based on how many items the customer has previously purchased from it.

  • Example logic: 1st order (e.g., buys Red) at full price; 2nd order (e.g., buys Blue) at 10% off; 3rd order (e.g., buys Yellow) at 20% off. Percentages are illustrative.
  • Purchases of multiples of the same item should count toward the collection’s tally and discount progression.
  • Goal: encourage customers to return and ultimately buy the full collection.

No specific apps or solutions have been identified yet; the request is for third‑party app recommendations and remains open.

Summarized with AI on January 26. AI used: gpt-5.

Hi~
im looking for an app with the following function.
say for example i have items: Red, Blue and Yellow, in a collection.
I want an app that enables a repeat purchase discount that works as follows (numbers are examples only)

Customer order 1, they ordered item red (Full Price)
Customer order 2 , they order item Blue (save 10%)
Customer order 3, they order item Yellow (save 20%)

They could purchase mulitple of the same item also for the discount, so ideally the discount would be based on the number of items previously purchased from that collection
To encourage people to come back and order the entire collection, but get a discount based on the number of items for the collection they have previously ordered.