Shopify App Comparison 2026
Moon Bundles CartDrawer Upsell
XB: Free Gifts & Buy X Get Y
Which Shopify upsell app increases AOV more? Compare pricing, features, ratings & real merchant reviews for Moon and XB: Free Gifts & Buy X Get Y to find the best fit for your store.
Create irresistible bundles, cart upsell, free gifts, BOGOs. Increase AOV with quantity breaks, volume discounts, cart drawer & post purchase upsell.
View Full DetailsKey Features
- Product bundles and free gifts with mix-and-match options and auto-applied bundle logic
- Cart drawer and cart upsell functionality that works across all themes and third-party apps
- Post-purchase upsells and customizable thank-you page offers
- Volume discounts, quantity breaks, and BOGO deal builder
- Bundle builder with fully customizable styling and layout options
Verdict on Moon
Moon Bundles is one of the best-value bundle apps on Shopify, combining bundles, cart drawer upsells, post-purchase offers, and volume discounts into a single install. The generous free tier and Built for Shopify badge make it a safe bet for any merchant. Its multi-language support and theme-wide compatibility stand out among competitors. The revenue cap pricing model is transparent — you only upgrade when your bundles are actually making money.
Create bundles with Buy X Get Y, free gifts, BOGO deals, and auto-applied discounts. Zero-coding setup with customizable templates.
View Full DetailsKey Features
- Auto-add free gifts to cart when promotion conditions are met
- Buy X Get Y and BOGO deal configuration with flexible rules
- Auto-apply discount codes for seamless customer experience
- Multiple customizable layout templates matching store branding
- Bundle discounts for increased cart value with zero-coding setup
Verdict on XB:
XB is a simple, free, and Built for Shopify-certified app for stores that just want BOGO and free gift promotions without complexity. With only 4 reviews it is very early stage, but the Built for Shopify badge and completely free pricing make it zero-risk to try. Best for merchants who want a lightweight promotion tool rather than a full bundle builder.
Frequently Asked Questions
What is a revenue cap?
The revenue cap is the maximum amount of bundle revenue your store can generate per month on each plan. The free Discovery plan caps at $500, Essential at $2,000, Pro at $10,000, and Premium is unlimited. Revenue beyond the cap requires upgrading.
Does Moon Bundles work with my theme?
Yes, Moon Bundles is designed for theme-wide compatibility and works with all Shopify themes including Online Store 2.0. The cart drawer also integrates with third-party apps and custom theme modifications.
Can I create BOGO deals?
Yes, Moon Bundles supports Buy One Get One deals, Buy X Get Y promotions, quantity breaks, and progressive free gifts. All can be configured from the bundle builder dashboard.
Is XB free?
Yes, XB is completely free with all features included. There are no paid plans or hidden costs.
How do auto-add free gifts work?
When a customer meets the promotion conditions (e.g., buys Product A), the free gift is automatically added to their cart without any action required from the customer.