Bundler is free. So why would anyone pay us $29?

Short version: Bundler (Bundler.app, on the App Store since 2019, 4.9 stars across more than 2,600 reviews) is one of the most honest deals in the category. The free plan really is free: no revenue caps, no order limits, volume discounts and quantity breaks included, POS included. Paid tiers at $9.99 and $19.99 gate features, not success. If your bundles are discounts and your orders never leave Shopify, install Bundler and keep your money; we mean that. Solid Bundles answers a different question: what happens to the order after the discount converts. That is the job we built for: bundles serious operations can trust.

What Bundler is genuinely good at

Breadth per dollar. Buy X get Y, volume discounts, quantity breaks and product-page upsells on the free plan; Mix and Match, tiered options, landing pages and funnel upsells at $9.99; analytics at $19.99. It works with Shopify POS on the free tier, which very few bundle apps offer at any price. Ljubljana-based, long-lived, consistently well reviewed. As a discount engine it has earned its install base.

The line that separates the two apps

Strip the widgets away and Bundler is a discount overlay: the offer is drawn on the product page, and when the shopper buys, the individual products carry the discount. No kit exists anywhere in your systems. That is not a flaw, it is the design, and for discount offers it is the correct design.

It stops being correct the moment your bundle is a real kit. There is no bundle for an ERP to reconcile, nothing that tells a warehouse these lines ship together, and kit-level availability does not exist because there is no kit. Solid Bundles inverts this: the kit is a real product that expands during checkout, through Shopify's native Cart Transform, into real component SKUs at original prices with the discount allocated per line. Availability is computed live from component stock, and the app has no write access to your inventory, so a failed job can never corrupt a count. The two-architectures guide covers this split in vendor-neutral terms, with a five-minute test you can run on both apps.

Pricing, honestly

LAST VERIFIED: SEPTEMBER 4, 2026, FROM BOTH PUBLIC APP STORE LISTINGS

On price alone Bundler wins at every row of that table, and pretending otherwise would insult your intelligence. What you are paying us $29 for is a different product: real-SKU kit orders, ERP-reconcilable pricing, zero inventory writes, and verification that re-runs every night in every market you sell in. If none of that list made you nod, you do not need us.

Who should pick which

• Pick Bundler if your bundles are discount offers, you fulfill your own orders, you want POS support without paying, or budget is the binding constraint. It is the best free option in the category.
• Pick Solid Bundles if a 3PL, WMS or ERP consumes your orders, if refunds must restock exact components, if you sell in several currencies and want every market verified nightly, or if your kits need variant selection or build-a-box with real SKUs behind them.

What is Solid Bundles?

Solid Bundles is Crescano's Shopify app for fixed bundles, kits and quantity breaks, built on Shopify's Cart Transform API. Real component SKUs land in every order by construction, the app never writes to your inventory, and a built-in verification tool creates real test carts in every market you sell to and re-runs every night. Priced at a flat $29 per month at any volume. The setup guide, 3PL guide, and troubleshooting docs are public.

Choosing from scratch? Start with the two architectures and the five-minute test. Comparing the whole category's costs? See what bundle apps actually cost at your volume.