Fly: Bundles & Quantity Breaks vs ICU• In Cart Upsell Cross Sellfor Shopify (2026)
Fly: Bundles & Quantity Breaks and ICU• In Cart Upsell Cross Sell are both Shopify apps designed to increase Average Order Value (AOV) through upselling and cross-selling, but they approach the problem from slightly different angles. Fly focuses on product bundles, quantity breaks, and volume discounts, aiming to encourage customers to buy more of the same or related products. It emphasizes creating integrated widgets without impacting store speed. ICU• In Cart Upsell Cross Sell, on the other hand, centers around targeted upsell and cross-sell offers throughout the customer journey, including product pages, the cart, pop-ups, and post-purchase. The key difference lies in their core strategies. Fly emphasizes larger quantities and bundled deals, potentially appealing to merchants with products suited for bulk purchases. Its focus on inventory sync and fulfillment suggests it's aimed at merchants concerned with managing larger orders efficiently. ICU focuses on personalized offers and A/B testing, appealing to merchants who want to optimize their upselling strategy using data and conditional logic. ICU's AI-autopilot offers further automation for hands-off upselling.
At a Glance
Fly: Bundles & Quantity Breaks
257 reviews
ICU• In Cart Upsell Cross Sell
575 reviews
Detailed Overview
Fly: Bundles & Quantity Breaks
Maximize AOV with product bundles, combos, quantity breaks, volume discounts, upsells, FBT & BOGO
Key Features
- Boost cart value with a Fixed Bundle, BOGO or Frequently Bought Together blocks.
- Drive bulk sales with tiered Quantity Break and Volume Discount triggers.
- Incentivize larger carts with a Free Gift and automated bundle upsell tools.
- Build well integrated, beautiful native widgets with zero impact on store speed
- Breakdown of bundles for auto discounting, inventory sync, fulfilment, & return
ICU• In Cart Upsell Cross Sell
Increase AOV w/Targeted Upsell & Cross Sell Offers. Product Page, In Cart, Pop-ups, & Post Purchase!
Key Features
- Maximize AOV with upsells on cart page/drawer, product pages & post purchase
- Set triggers & rules for efficiently targeted cart upsell & cross-sell offers
- Drive extra revenue with our robust pre and post-purchase upsell capability
- Fine-tune upsell cart strategies with a smart, easy to read analytics dashboard
- AI-autopilot feature to power the perfect automatic upselling and cross-selling
Feature Comparison
| Rating | 5/5 | 4.8/5 |
Rating Fly: Bundles & Quantity Breaks5/5 ICU• In Cart Upsell Cross Sell4.8/5 | ||
| Reviews | 257 | 575 |
Reviews Fly: Bundles & Quantity Breaks257 ICU• In Cart Upsell Cross Sell575 | ||
| Core Strategy | Bundles, Quantity Breaks, Volume Discounts | Targeted Upsell & Cross-Sell Offers |
Core Strategy Fly: Bundles & Quantity BreaksBundles, Quantity Breaks, Volume Discounts ICU• In Cart Upsell Cross SellTargeted Upsell & Cross-Sell Offers | ||
| Placement | Native Widgets | Product Page, In Cart, Pop-ups, Post Purchase |
Placement Fly: Bundles & Quantity BreaksNative Widgets ICU• In Cart Upsell Cross SellProduct Page, In Cart, Pop-ups, Post Purchase | ||
| Automation | Automated Bundle Upsell | AI-autopilot |
Automation Fly: Bundles & Quantity BreaksAutomated Bundle Upsell ICU• In Cart Upsell Cross SellAI-autopilot | ||
| A/B Testing | Not explicitly mentioned | A/B Testing on Product Upsell & Cross-Sell |
A/B Testing Fly: Bundles & Quantity BreaksNot explicitly mentioned ICU• In Cart Upsell Cross SellA/B Testing on Product Upsell & Cross-Sell | ||
| Inventory Management | Inventory Sync | Not explicitly mentioned |
Inventory Management Fly: Bundles & Quantity BreaksInventory Sync ICU• In Cart Upsell Cross SellNot explicitly mentioned | ||
| Reporting | Breakdown of bundles for auto discounting | Analytics Dashboard |
Reporting Fly: Bundles & Quantity BreaksBreakdown of bundles for auto discounting ICU• In Cart Upsell Cross SellAnalytics Dashboard | ||
- Conversion Audit
- Speed Audit
- SEO Audit
Conversion Audit
Our Verdict
For merchants primarily focused on encouraging bulk purchases or selling products that naturally complement each other in bundles, Fly: Bundles & Quantity Breaks is likely the better choice. Its emphasis on fixed bundles, quantity breaks, and efficient inventory management makes it ideal for businesses looking to increase order size through strategic discounting and product combinations. The 5/5 rating suggests high user satisfaction with its core functionalities.
However, if the goal is to dynamically personalize upsell and cross-sell offers throughout the entire customer journey and optimize them through A/B testing, ICU• In Cart Upsell Cross Sell offers a more comprehensive solution. Its AI-autopilot feature and focus on post-purchase upselling provide additional avenues for increasing AOV. While its rating is slightly lower (4.8/5), the larger number of reviews (575) suggests wider adoption and potentially more battle-tested features.
Common Questions
Which app is easier to set up?
ICU states "3 minute setup" so may be faster to install. Fly does mention zero coding requirements, suggesting ease of use too.
Which app is better for a beginner?
Both apps seem geared toward ease of use, but ICU's AI-autopilot feature might make it slightly more accessible for beginners who want a hands-off approach to upselling.
Which app offers more control over the customer journey?
ICU offers upsell/cross-sell opportunities throughout the product page, cart, pop-ups and post-purchase journey, indicating it offers more control over where upselling occurs.
Which app is more suited for products with high inventory turnover?
Fly's inventory sync capabilities make it more suitable for products with high inventory turnover where accurate stock management is crucial.
Which app provides more robust analytics?
ICU features a 'smart, easy to read analytics dashboard', making its reporting seem more extensive.
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