Shopify 2.0 Native Zero-latency bundle engine with native Theme App Extensions is now active.
How it works Open Shopify Admin Add to Shopify
Built 100% for Shopify Online Store 2.0

All You Need
for Better Bundles.

Native Shopify bundles, automatic checkout discounts, and smart matching add-ons

Bundle Builder
Free Gifts
BOGO
Volume Discount
Mix and Match
Cross-sell
Smart Add-ons
Frequently Bought Together
Start Free Today Interactive Preview
https://store.myshopify.com/products/apex-trail-performance-runner
Best Seller Apex Trail Performance Sneaker
Thumbnail 1 Thumbnail 2 Thumbnail 3
Apex Athletics Co.

Apex Trail Performance Runner

$216.00 $240.00 Save 10% + Free Gift
Design Theme Preset: 1. Signature Crimson
Buy more, Save more Instant Tier Savings
Buy 1 item
$100.00
#1
Popular
Buy 2 +Free Gift
$200.00
#1
#2
Free gift
Included automatically
Free $60.00
Buy 3 Save 30%
$210.00 $300.00
#1
#2
#3
Tap any tier package above to test real-time pricing and variant customization.
Volume Discount + Free Gifts

They Need to Save More!

Create tiered volume offers that reward customers for adding more units of products they already want.

  • Multi-Variant Independence: Customers choose color, size, and style for each bundle item independently.
  • Built-In Free Gifts: Attach automated bonus gifts directly into higher volume tiers.
  • Custom Badges & Tags: Highlight popular choices with high-converting crimson ribbons and pill tags.
Explore Volume Bundles →
Buy more, Save more
Buy 1 item
$100.00
Popular
Buy 2 +Free Gift
$200.00
#1
Red ▾
Small ▾
#2
Blue ▾
Large ▾
Free gift
Free $60.00
Buy 3 Save 30%
$210.00 $300.00
Buy X Get Y Bundle Unlock Deal
Shoes
High-Top Street Runners
$60.00
+
Free Gift
Socks
Performance Cotton Socks
FREE $10.00
Total Bundle:
$60.00 $70.00
Buy X Get Y & Free Gifts

They Need Gifts for Motivation.

Motivate customers to purchase more with advanced Buy X Get Y offers and complementary free gifts right on the product page.

  • Diagonal Promotional Ribbons: Eye-catching "Free Gift" and "% OFF" ribbons drive immediate focus.
  • Native 1-Click Cart Addition: Both products are added simultaneously with accurate discount tokens.
Explore BOGO & BXGY →
BUNDLE ENGINE SUITE

Five Flexible Bundle Offer Types

Create volume offers, BOGO deals, custom bundles, paired products, and automatic smart add-ons for any Shopify catalog.

Tiered Volume Discounts

Incentivize multi-quantity purchases with tiered price brackets (Buy 1 @ standard, Buy 2 @ 10% off, Buy 3 @ 20% off). Automatically expands size and color selectors for each individual item.

Best For: Consumables, fashion basics, supplements, accessories

BOGO (Buy X Get Y Free)

Configure "Buy 2 Get 1 FREE" or "Buy 3 Get 1 FREE" offers with clear badges and a native checkout discount.

Best For: Footwear, jewelry, cosmetics, phone cases, gifts

Mix & Match Bundle Builder

Enable customers to build their own custom box or pack from your catalog. Includes a visual tiered progress bar and milestone free gift unlock indicators.

Best For: Gift boxes, variety packs, beauty kits, beverages

Smart Matching Add-ons

Automatically show 1–3 complementary products directly below Add to Cart. Stackr matches by product tags, category, title intent, availability, and price sweet spot—for example, a screen protector with a phone case.

Best For: Phone case + glass, camera + card, skincare + applicator
MERCHANT ADMIN SUITE

Intuitive Campaign Management Built for Store Owners

Create, publish, and manage discount bundles inside a focused merchant workspace.

  • Offer-Specific Live Preview: See BOGO, volume, bundle builder, and smart add-on designs update instantly. Choose Compact, Cards, List, or Minimal before publishing.
  • Granular Targeting: Apply bundles to manual products, product tags, or whole store with 1 click.
  • Direct Revenue Attribution: Accurately track upsell revenue, bundle conversion lift, and extra items per cart.
  • Shopify Theme App Extensions: Works out-of-the-box with 100% clean Liquid architecture.
Campaign setup
Guided three-step editor
Catalog matching
Stock and margin aware
Active Bundle Campaigns Checkout synced
Buy 2 Get 1 Free Promo
BOGO Package
Active
Signature Volume Tiers
Tier 1 / 2 / 3 + Gift
Active
Build Your Sneaker Pack
Mix & Match Builder
Active
TECHNICAL ADVANTAGE

A Clean Foundation for Product Bundles

See how each Stackr feature works across the merchant admin, storefront, and checkout.

Feature Stackr (ConfirmFlow) How it works
Storefront Page Speed Lightweight, deferred theme assets Feature assets load with the matching theme app block.
Theme Code Integrity 100% Theme App Extension Merchants add or remove blocks in the Theme Editor.
Upsell Revenue Fee 0% Commission (Keep 100%) Subscription plans are approved and billed by Shopify.
Variant Selectors Full Dropdowns per Item Buyers can select available product variants.
Free Gift Milestones Built-in Automated Logic Gift rules are configured inside the campaign editor.
Complementary Add-ons Automatic tag, category & price matching Signals include tags, category, title, stock, and cost.
TRANSPARENT PRICING

Simple Pricing. No Revenue Tax.

Free until Stackr generates $200 USD equivalent in monthly bundle sales. Then pay a flat $10/month—no matter how much you sell.

Free

$0 / month

Start selling at no charge until Stackr generates $200 USD equivalent in bundle sales per month.

  • ✓ Up to $200 USD equivalent monthly sales
  • ✓ Automatic currency conversion
  • ✓ All five offer engines
  • ✓ Native checkout discounts
Start Free
ONE FLAT PRICE

Unlimited

$10 / month

Once monthly Stackr-attributed sales exceed $200 USD equivalent, the price remains flat at this tier for any sales volume.

  • ✓ Unlimited campaigns
  • ✓ Unlimited bundle sales
  • ✓ Smart matching add-ons
  • ✓ No percentage or usage charges
Choose Unlimited

Ready to Create Your First Bundle?

Install Stackr, choose live products, publish a campaign, and activate its theme block.

Add Stackr to Shopify View Live Demo