Shopify App Comparison 2026

FBP | Fast Bundle Product

5.02,380 reviews
VS

Smart Checkout Widgets

5.04 reviews

Which Shopify upsell app increases AOV more? Compare pricing, features, ratings & real merchant reviews for FBP and Smart Checkout Widgets to find the best fit for your store.

Build product bundles quickly with mix-and-match, volume discounts, and frequently bought together offers.

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Key Features

  • Multiple bundle types including fixed, mix-and-match, frequently bought together, and subscription bundles
  • Real-time inventory sync ensuring bundles never oversell individual products
  • Customizable bundle widget with drag-and-drop layout builder
  • Subscription bundle support for recurring revenue streams
  • Seamless integration with Shopify checkout and discount system

Verdict on FBP

Fast Bundle earns its perfect 5.0 rating by delivering a polished, fast, and reliable bundling experience. Its inventory sync feature is a standout, preventing the overselling issues that plague some competing apps. The subscription bundle capability on the Growth plan also makes it a strong choice for stores building recurring revenue. If you need a versatile, well-built bundle app, Fast Bundle belongs on your shortlist.

Built for Shopify

Personalize upsells, gifting, and custom content at checkout to increase AOV.

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Key Features

  • Smart Gifts/BOGO and automatic stackable discounts
  • Checkout UX widgets and custom banners
  • Social proof and shipping/payment reorder options
  • Custom form fields for checkout
  • Thank You and Order Status page support

Verdict on Smart

Smart Checkout Widgets is a Built for Shopify checkout customization tool that adds gifting, upsells, and custom content directly in the checkout flow. The free-to-install starter plan with 100 orders/month is great for testing. Only 4 reviews but the 5.0 rating and Shopify certification are promising.

Frequently Asked Questions

Does Fast Bundle sync with Shopify inventory?

Yes, Fast Bundle includes real-time inventory synchronization that tracks individual product stock levels within bundles. When a component product sells out, the bundle is automatically marked as unavailable, preventing overselling.

Can I create subscription bundles?

Yes, the Growth plan at $19.99/month supports subscription bundles. Customers can subscribe to receive a bundle on a recurring basis, helping you build predictable recurring revenue.

What types of bundles can I create?

Fast Bundle supports fixed bundles, mix-and-match bundles, frequently bought together offers, volume discount bundles, and subscription bundles. The Starter plan unlocks most bundle types, with subscription bundles available on the Growth plan.

Does this work with all Shopify plans?

Some checkout customization features may require Shopify Plus. Check the specific widget capabilities for your plan level.