Most people who search for Pumper Bundles alternatives are not rejecting quantity breaks. They want the same “buy more, save more” mechanic with one of three changes: gifts or a cart layer next to it, a pricing curve that fits their revenue, or a way to test which tier actually earns more. So this guide starts from the tiers and works outwards.
A note on transparency: Moon Bundles is our app, and it is one of the options below. We do not publish figures or feature lists for Pumper Bundles, because we cannot verify them: read its Shopify App Store listing for what it includes today. The figures for the other apps come from the public listings as read on August 31, 2026, and we say where each one is the better choice. Plans change, so confirm them before you decide.
What a Quantity-Break Offer Needs to Do
A quantity break gives a lower price per unit as the shopper adds more of the same product, for example 2 units for 10% off and 3 units for 20% off. It works when the saving is visible on the product page before the click, when the discount applies by itself at checkout, and when each extra unit has a clear reason to be added.
Whatever app you use, test it against those three points:
- Visible saving: the tiers and what the shopper saves are readable on the product page, on mobile too.
- Automatic discount: no code to type, so no abandoned cart over a code that did not work.
- Clean order data: the right quantity, variants and price reach the cart and the order.
If you want the broader picture of what raises order value, read our guide to Shopify average order value, and see how volume discounts work in Moon Bundles.
Which Apps Pair Tiers With Bundles and Gifts
The table follows our comparison pages, as of August 31, 2026. Pumper Bundles is not in it: check its listing for its modules.
| App | Bundles | Volume discounts | Free gifts | Reviews (public listing) |
|---|---|---|---|---|
| Moon Bundles | Included | Included | Included | 613 at 5.0 |
| Kaching Bundles | Included | Included | Included | 5,416 at 5.0 |
| Rapi Bundles | Included | Included | Not covered | 1,426 at 5.0 |
| Amose Bundle | Included | Included | Included | 26 at 4.3 |
| UpCart | Not covered | Included | Included | 866 at 4.7 |
| AfterSell | Not covered | Not covered | Not covered | 911 at 4.8 |
UpCart and AfterSell are both published by Rokt, and neither has been listed on the Shopify App Store since October 2026: read their ratings and review counts as a dated snapshot, not as current figures.
What Each App Adds Beyond the Tiers
Moon Bundles: tiers, gifts and the layers around them
In Moon Bundles a quantity break is one of four modules: bundles, volume discounts, free gifts and a cart drawer with a one-click post-purchase upsell. You can set tiers such as 2 for 10% off and 3 for 20% off, add a free gift that unlocks at the same tier, and compare versions with an A/B test across modules. The free plan covers up to $500 of generated revenue with one module of your choice; paid plans cost $19.99, $39.99 and $79.99 a month with all four modules and a 7 day free trial (see pricing).
Its AI side is concrete: an MCP connector on every plan lets you work from Claude, ChatGPT or Gemini, and Agents follow your results and prepare the next tests, which you can start from Claude Cowork. The trade-off: fewer public reviews than Kaching Bundles, and a first paid plan that is not the cheapest.
Kaching Bundles and Rapi Bundles
Kaching Bundles brings 5,416 public reviews at 5.0 stars and a mature bundle editor; its Starter plan is $14.99 a month. Its cart drawer and post-purchase upsell are separate apps with their own plans. Rapi Bundles covers bundles, volume discounts, a post-purchase upsell and A/B testing in one app (1,426 reviews at 5.0), and its uncapped Elite plan is $59 a month, below our $79.99. It has no cart drawer and no gifts unlocked by cart value. Details: Moon Bundles vs Kaching Bundles and Moon Bundles vs Rapi Bundles.
Amose Bundle
Amose Bundle lists bundles, quantity breaks, gifts, a cart drawer and post-purchase offers, and its $29.99 plan has no revenue cap, the lowest uncapped price here. Its track record is short (26 reviews at 4.3) and its listing does not mention A/B testing, so you would adjust tiers without measuring them. See Moon Bundles vs Amose Bundle.
UpCart and AfterSell
These two are specialists rather than tier tools. UpCart is a cart drawer that also covers volume discounts and gifts but not bundles; AfterSell is a post-purchase funnel with no tiers or bundles. If the cart or the moment after payment is your main lever, they go deeper than we do. See Moon Bundles vs UpCart and Moon Bundles vs AfterSell.
Rebuild Your Tiers Without Losing Margin
Moving apps is the moment to check that your tiers still pay. Take a product that sells for $30 and costs you $12, so one unit earns $18. The numbers below are an illustration, not a benchmark:
- 1 unit: $30 revenue, $12 cost, $18 margin.
- 2 units at 10% off: $54 revenue, $24 cost, $30 margin.
- 3 units at 20% off: $72 revenue, $36 cost, $36 margin.
Here each tier earns more per order than the one before, even though margin per unit falls from $18 to $15, then $12. Run the same arithmetic on your own prices before you copy a tier ladder from one app to another, and check that shipping or fees do not eat the difference.
- Export your current tiers: products, quantities and discounts, so nothing is rebuilt from memory.
- Record a baseline: conversion rate, average order value and revenue per visitor over a few weeks.
- Rebuild one product first on a duplicate theme, then check the saving display, the cart price and the order on desktop and mobile.
- Compare against the baseline and judge on revenue per visitor: a higher order value that lowers conversion is not a win.
- Disable the old app only once nothing duplicates, and check that no widget is left behind.
For the bundle side of the same decision, see how to bundle products on Shopify.
A Short Decision Guide
- Tiers plus gifts, a cart drawer and a post-purchase upsell in one install: Moon Bundles.
- Tiers and bundles, with reviews as the deciding factor: Kaching Bundles.
- Tiers and a post-purchase upsell, at a lower top price: Rapi Bundles.
- Lowest uncapped price, short track record accepted: Amose Bundle.
- Your tiers already work and nothing is missing: stay on Pumper Bundles. For a wider shortlist, read our guide to the best Shopify bundle app.
Frequently asked questions
What is the difference between a quantity break and a bundle?
A quantity break lowers the price when a shopper buys more units of the same product. A bundle groups several products into one offer. Many stores use both, so check that an app supports the one you need before you move.
How many tiers should a quantity-break offer have?
There is no universal number. Two or three tiers are easy to read on a product page; more can become hard to scan on mobile. Pick tiers from your margin per unit, as in the example above, and test one change at a time.
Should a tier discount be a percentage or a fixed amount?
Either can work. A percentage is simple to read and scales with the price, while a fixed amount gives you tighter control of margin. Whichever you choose, confirm that the app shows the saving clearly and applies it at checkout without a code.
Can I add a free gift to a quantity break?
With some apps, yes. In Moon Bundles a free gift can unlock at the same tier as the discount, so the offer reads as one decision. Check each listing, since coverage differs from app to app.
How do I know the new tiers perform better?
Compare revenue per visitor, conversion rate and average order value against a baseline recorded before the switch, over similar periods and traffic. Change one thing at a time so you know which change moved the numbers.
