We make one of the apps on this page, so read it with that in mind. Prices and features of other apps come from their Shopify App Store listings, checked on November 14, 2026. Plans change: check the listing before you decide.
On this page
Pumper Bundles Quantity Breaks is a popular quantity break app with 3,649 reviews and the Built for Shopify badge. Volumo, our app, covers the same core offers. The main differences are pricing model, a few features, and maturity.
Price
From the App Store listings, checked November 14, 2026:
| Pumper plan | Extra revenue | Monthly | Yearly |
|---|---|---|---|
| Free | Up to $300 | $0 | |
| Starter | Up to $1,000 | $9.99 | $94.68 |
| Growth | Up to $5,000 | $29.99 | $269.88 |
| Unlimited | No limit | $49.99 | $449.88 |
| Volumo | Any | Free during launch |
Pumper’s price follows the extra revenue it attributes to its offers. A store with $1,200 of tracked bundle revenue a month pays the Growth plan, the same as one at $5,000.
Features compared
| Volumo | Pumper | |
|---|---|---|
| Quantity breaks on the product page | Yes | Yes |
| Discount per unit, percentage or flat | Percentage or fixed amount per item | Each unit, percentage or flat |
| Bundle offers | Fixed bundles | Yes |
| Buy X get Y | Yes | Yes |
| Free gifts | Added and removed automatically | Yes |
| Spend more, save more | Yes | See listing |
| Cart progress messages | Yes | See listing |
| A/B test of tiers | Yes | See listing |
| Tier suggestions from price and cost | Yes | No |
| Countdown with a real end date | Yes | See listing |
| Built for Shopify badge | No | Yes |
| Reviews on the App Store | None yet (new app) | 4.9 from 3,649 |
An honest note on free options
Volumo isn’t the only free way to run quantity breaks. Bundler’s free plan, for instance, lists volume discounts, quantity breaks and buy X get Y with unlimited revenue and orders (App Store listing, November 14, 2026). If free is the deciding factor, look at both, and choose on how the offer looks on your product page and how the discount is applied at checkout.
When to stay on Pumper
If you’re on the free plan and well under $300 of extra revenue a month, there’s little reason to move. If you rely on a Pumper feature Volumo doesn’t list, or value its review history, stay.
When Volumo fits better
You want tiers chosen from your margin, a cart that shows “add 1 more”, a real-date countdown and an A/B test, without a plan that steps up as your offers work.
Volumo by Centubo. Shows quantity breaks, buy X get Y, bundles and free gifts on your product pages, and applies the discount at checkout. Free during launch.
Install on ShopifyQuestions people ask
What does Pumper charge?
Free up to $300 of extra revenue, then Starter $9.99 a month up to $1,000, Growth $29.99 up to $5,000 and Unlimited $49.99 (App Store listing, November 14, 2026), each with a 7-day trial.
Are there other free quantity break apps?
Yes. Bundler's free plan, for example, lists volume discounts and quantity breaks with unlimited revenue and orders. Compare the product page design and how the discount is applied before choosing.