Bundler vs ConvertX: which bundle app fits your Shopify store?

The short answer

Bundler and ConvertX both put bundle offers on your product pages, but they are built for different jobs. Bundler is a specialist: almost everything it does revolves around bundles, quantity breaks and discount rules. ConvertX is a generalist: bundles are one module next to upsells, a cart drawer, a sticky add-to-cart bar, payment icons, shoppable stories and theme sections.

So the real question is not which app is "better". It is whether you are looking for a bundle tool, or for one app that replaces several conversion tools. This page goes through both cases with the numbers from each app's Shopify App Store listing, checked on October 13, 2026.

Who is behind each app

Bundler has been on the Shopify App Store since July 2019. It carries the Built for Shopify badge, a 4.9 rating from 2,729 reviews at the time of writing, and an admin available in 17 languages. That history matters: many edge cases (discount stacking, multi-currency, POS) have already been hit and fixed by thousands of merchants before you.

ConvertX launched in September 2025. It has a 5.0 rating, but from 3 reviews, and it does not have the Built for Shopify badge. Its admin is available in English, French, Spanish and German. A young app is not automatically a risk, but you should weigh a long public track record against a short one, especially if bundles drive a large share of your revenue.

Bundle offers: where Bundler is ahead

Quantity breaks and volume discounts

Both apps handle the classic "buy 1, buy 2, buy 3 and save more" block above the add-to-cart button. ConvertX presents it as multi-pack offers (1, 2 or 3 packs, with a "most popular" badge on the tier you want to push). Bundler offers the same idea with flexible volume conditions and percentage, fixed-amount or fixed-price discounts.

The difference is cost. On Bundler, quantity breaks are part of the free plan, with unlimited orders and no cap on the revenue the app generates. On ConvertX, there is no free plan for live stores: you start at $19.99 per month. If a quantity break block is literally all you need, Bundler wins on price, and it is not close.

Mix & Match, build-a-box and fixed bundles

This is Bundler's strongest area. From the Premium plan at $9.99 per month, you get Mix & Match bundles, including tiered and sectioned versions, quantity break combinations, variant-level bundles and dedicated bundle landing pages. Its listing also covers build-a-box, gift boxes, sample packs and subscription boxes.

ConvertX's bundle module is centred on quantity and multi-pack offers on a single product. Complementary products are handled by the Upsells module (frequently bought together, one-click add-ons) rather than by a "pick any 3 from this collection" builder. Mix and match is not listed in ConvertX's documentation. If your offer is "build your own box of 6 snacks", Bundler is the tool for that. We cover the format itself in our guide to mix and match bundles on Shopify.

Buy X Get Y and free gifts

Bundler includes Buy X Get Y on its free plan and lists free gifts among its offers. ConvertX supports free gifts added directly on product pages, but Buy X Get Y as a rule type is not listed on its App Store page. For a store that runs a lot of "buy 2, get the third free" promotions, Bundler is again the more complete option.

Beyond the bundle: where ConvertX is different

A cart drawer that does more than list items

ConvertX includes a full cart drawer: a free-shipping progress bar, a timer, product recommendations, shipping protection, a discount code field and payment icons. Bundler's listing mentions cart upsells and showing its offers in the cart, but it does not list a drawer with a progress bar, timer or shipping protection. In practice, a Bundler store that wants those features adds a dedicated cart app on top.

Sticky add to cart, stories, trust icons and sections

The rest of ConvertX's modules have no equivalent in Bundler, which never claimed to cover them:

• a sticky add-to-cart bar that follows the scroll on mobile and desktop;
• payment and trust icons under the buy button and in the cart;
• shoppable vertical video stories (UGC, demos, unboxings) on product pages;
• a library of ready-made theme sections and product blocks (testimonials, FAQ, comparison table, delivery date, stock), on the Premium plan.

ConvertX AI

ConvertX lets you describe an offer in plain language. The AI analyses the store, builds the bundle, upsell, cart or section, and publishes only after you confirm. It never edits the live theme directly. No comparable AI builder appears on Bundler's App Store page. Whether this matters depends on you: if you already know exactly what you want, a classic form is just as fast.

Pricing, compared without spin

Two details deserve attention.

First, Bundler's analytics (total revenue, average order value, conversions, applied discounts, best performing bundles) sit on the Executive plan at $19.99. So a Bundler store that wants to measure its bundles pays the same monthly price as ConvertX Essential, which includes basic analytics for every module.

Second, ConvertX Essential is capped at 4 active modules and $1,000 of additional revenue per month. A store running bundles, upsells, cart drawer, sticky add to cart and payment icons together needs 5 modules, so Premium at $34.99. And if your offers bring in more than $1,000 a month in extra revenue, you also move to Premium. Bundler never charges more as your bundle revenue grows.

Here is what that looks like for common needs:

For protecting margin on the offers themselves, see our piece on bundle pricing strategy. ConvertX's full plan details are on the pricing page.

Analytics and targeting

ConvertX tracks clicks, add-to-carts, checkouts and attributed revenue per module, and lets you target modules by product, collection, device or market (advanced targeting is a Premium feature). That is useful when you run several modules and want to know which one actually pays for itself.

Bundler's reporting focuses on bundle performance: revenue, average order value, conversion and discount graphs, and the most popular bundles. Targeting works through discount conditions and custom rules. For a bundles-only store, that is enough. For a store juggling five conversion tools, having one dashboard for all of them is ConvertX's main practical advantage.

Integrations

Bundler works with Shopify POS, Checkout, Seal Subscriptions, subscription products, PageFly, Cartbot and multi-currency converter apps. If you sell in a physical shop or run a subscription programme, that compatibility is a real reason to choose it.

ConvertX lists Checkout and the Shopify admin. POS and subscription compatibility are not listed, so check with ConvertX support before relying on either.

Three store profiles

A coffee roaster selling 250 g and 1 kg bags, with a market stall on weekends. Bundler. Quantity breaks are free, POS covers the stall, and the roaster can add a "pick 3 origins" Mix & Match box for $9.99 later.

A skincare brand whose theme already has a decent cart, testing "buy 2, get 1 free". Bundler again. Buy X Get Y is on the free plan, and there is no reason to pay for modules the store will not use.

A store running paid traffic to product pages, with no cart drawer, no sticky bar and no trust icons. ConvertX. One app covers the product page offer, the drawer, the sticky bar and the icons, and the per-module analytics show what each piece adds. Essential is enough until the store passes 4 modules or $1,000 of extra monthly revenue.

Switching between the two

Moving in either direction follows the same steps:

1. List every live offer: products, tiers, discount values, start and end dates.
2. Recreate them in the new app before removing anything from the old one.
3. Never leave two bundle widgets on the same product page. Shoppers see duplicated offers, and discounts can stack in ways you did not plan.
4. Remove the old app's blocks or embeds in the theme editor, then uninstall it.
5. Place a few test orders covering each tier and check the discount lines at checkout.

Both apps offer a 7-day trial on paid plans, which is enough to rebuild your offers and compare results on real traffic before paying.

Bottom line

Pick Bundler if bundles are the job. It is cheaper at every level for that use, it goes further on bundle formats, and it has years of public reviews behind it. Pick ConvertX if bundles are one part of a broader conversion setup and you would otherwise pay for a cart drawer, a sticky bar and trust icons separately. For a wider view of the category, our comparison of the best Shopify bundle apps covers more options.