Key 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.

Key Features

• Upsell, cross-sell, BOGO, BXGY, and frequently bought together in one app
• Progress bar with milestone rewards encouraging higher cart values
• Automatic free gift insertion and free shipping automation
• Custom rules, scheduling, and market targeting with multi-currency support
• Real-time analytics tracking promotion performance

Verdict on Zapio:

Zapio is a remarkable completely-free upsell app that includes features other apps charge $20-40/month for. The progress bar and milestone rewards system is a standout feature that drives spending increases. It is still very new with only 9 reviews, so reliability over time is unproven, but the feature set is genuine and the zero-cost entry makes it risk-free to try. A strong option for budget-conscious merchants.