Shopify 2.0 Native Zero-latency bundle engine with native Theme App Extensions is now active.
Live Store Demo Merchant 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!

Boost sales and increase AOV with tiered volume discount offers that reward customers for buying more units of the products they already love.

  • 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 Demo →
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.
Test BOGO & BXGY →
BUNDLE ENGINE SUITE

Five Flexible Ways to Increase Revenue Per Order

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)

The highest-converting promotional mechanism in modern retail. Configure "Buy 2 Get 1 FREE" or "Buy 3 Get 1 FREE" with high-contrast badge callouts and zero checkout friction.

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

Launch, monitor, and optimize your discount bundles inside a clean, distraction-free admin designed specifically for high-velocity merchants.

  • Real-Time Live Preview: Interactive side-by-side preview updates immediately as you edit discounts and badges.
  • 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.
Upsell Revenue
$48,920.00 +34.2%
Conversion Rate
8.4% +2.1%
Active Bundle Campaigns 4 Live
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

Engineered to Outperform Legacy Bundle Apps

See how Stackr provides faster speeds, cleaner architecture, and zero revenue cuts.

Feature Stackr (ConfirmFlow) Legacy Bundle Apps
Storefront Page Speed Lightweight, deferred theme assets Heavy scripts (50KB - 250KB)
Theme Code Integrity 100% Theme App Extension Invasive code edits to liquid files
Upsell Revenue Fee 0% Commission (Keep 100%) Takes 1% - 3% cut of upsells
Variant Selectors Full Dropdowns per Item Frequently locked to single variant
Free Gift Milestones Built-in Automated Logic Requires third-party add-on
Complementary Add-ons Automatic tag, category & price matching Usually configured one product at a time
TRANSPARENT PRICING

Predictable Plans That Scale With You

Free until Stackr generates $200 in monthly bundle sales, then simple $5, $15, or $25 plans. No percentage commission.

Free

$0 / month

Start selling with no charge until Stackr generates $200 in bundle sales per month.

  • ✓ Up to $200 monthly bundle sales
  • ✓ All five offer engines
  • ✓ Native checkout discounts
  • ✓ Free on development stores
Start Free

Starter

$5 / month

For stores generating $201–$1,000 in monthly bundle sales.

  • ✓ Unlimited campaigns
  • ✓ Volume, BOGO & bundle builder
  • ✓ Smart matching add-ons
  • ✓ Storefront analytics
Choose Starter
Most Popular

Growth

$15 / month

For stores generating $1,001–$5,000 in monthly bundle sales.

  • ✓ Everything in Starter
  • ✓ AI catalog-wide recommendations
  • ✓ Tag & price sweet-spot rules
  • ✓ Priority email support
Choose Growth

Scale

$25 / month

For stores generating more than $5,000 in monthly bundle sales.

  • ✓ Everything in Growth
  • ✓ Unlimited bundle sales
  • ✓ Custom CSS & font matching
  • ✓ Priority setup assistance
Get Scale Plan

Ready to Multiply Your Average Order Value?

Install Stackr in less than 60 seconds and see your first bundle live on your store today.

Add Stackr to Shopify View Live Demo