CartHook Upsells vs Fly: Bundles & Quantity Breaksfor Shopify (2026)
CartHook Upsells and Fly: Bundles & Quantity Breaks both aim to increase AOV for Shopify merchants through upsells and cross-sells, but they approach the problem with different focuses. CartHook Upsells specializes in post-purchase upsells, particularly one-click upsells after checkout and upsells on the thank you page (TYP). Its strength lies in its A/B testing capabilities and customized offer funnels, allowing merchants to refine their upsell strategies based on data. It is best for merchants wanting to focus on optimized post-purchase experiences. Fly: Bundles & Quantity Breaks, on the other hand, concentrates on pre-purchase bundles, quantity breaks, and volume discounts. It emphasizes creating integrated, visually appealing widgets to encourage customers to add more items to their carts. Fly also promises zero impact on store speed and offers 24/7 support, indicating a focus on ease of use and performance. Fly is optimal for merchants who want to improve the shopping experience within the store with various forms of product bundles and quantity breaks. Both apps support BOGO offers, but beyond that, the features differ greatly.
At a Glance
CartHook Upsells
89 reviews
Fly: Bundles & Quantity Breaks
257 reviews
Detailed Overview
CartHook Upsells
Boost sales with tailored post purchase offers, intuitive upsell funnels and one-click upsells
Key Features
- Drag & Drop builder for BOGO, discounts, post-purchase offers, and TYP upsells
- Our One-Click Upsells allow easy repeat purchases without re-entering details
- Effectively refine sales strategies with our A/B Testing feature
- Customize offers based on customer location and tags with advanced funnels
- Get insights on AOV and conversion rates with our Analytics Dashboard
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
Feature Comparison
| Rating | 4.4/5 | 5/5 |
Rating CartHook Upsells4.4/5 Fly: Bundles & Quantity Breaks5/5 | ||
| Reviews | 89 | 257 |
Reviews CartHook Upsells89 Fly: Bundles & Quantity Breaks257 | ||
| Primary Upsell Focus | Post-Purchase (One-Click & TYP) | Pre-Purchase (Bundles & Quantity Breaks) |
Primary Upsell Focus CartHook UpsellsPost-Purchase (One-Click & TYP) Fly: Bundles & Quantity BreaksPre-Purchase (Bundles & Quantity Breaks) | ||
| Key Feature Highlight | A/B Testing & Analytics | Bundle Creation & Store Speed Optimization |
Key Feature Highlight CartHook UpsellsA/B Testing & Analytics Fly: Bundles & Quantity BreaksBundle Creation & Store Speed Optimization | ||
| Offer Customization | Location & Tag Based | Free Gift, Subscription and Quantity Breaks |
Offer Customization CartHook UpsellsLocation & Tag Based Fly: Bundles & Quantity BreaksFree Gift, Subscription and Quantity Breaks | ||
| Ease of Use | Drag & Drop Builder | Zero Coding Required |
Ease of Use CartHook UpsellsDrag & Drop Builder Fly: Bundles & Quantity BreaksZero Coding Required | ||
| Primary Value Proposition | Optimize Post-Purchase Flow | Increase Cart Value with Bundles |
Primary Value Proposition CartHook UpsellsOptimize Post-Purchase Flow Fly: Bundles & Quantity BreaksIncrease Cart Value with Bundles | ||
| Analytics | Detailed AOV & Conversion Tracking | Bundle breakdown for inventory sync, fulfilment, and returns. |
Analytics CartHook UpsellsDetailed AOV & Conversion Tracking Fly: Bundles & Quantity BreaksBundle breakdown for inventory sync, fulfilment, and returns. | ||
Our Verdict
For merchants heavily focused on optimizing the post-purchase experience and leveraging data-driven insights to refine upsell strategies, CartHook Upsells is likely the better choice. Its A/B testing and analytics capabilities are valuable for identifying high-converting offers. However, a merchant prioritizing the pre-purchase user experience, specifically with visually appealing bundles and quantity discounts to increase initial cart value, Fly: Bundles & Quantity Breaks is the stronger option. Its focus on store speed and ease of use makes it a practical solution for merchants of all sizes. If the main objective is to add products to the cart, Fly: Bundles & Quantity Breaks is superior.
Common Questions
Which app is easier to use?
Both apps claim to be easy to use. CartHook uses a drag-and-drop builder, while Fly emphasizes zero coding required and 24/7 support. The perception of 'easier' will depend on the merchant's specific skillset and comfort level with visual editors versus guided setups.
Which app provides better analytics?
CartHook explicitly mentions A/B testing and an analytics dashboard providing insights into AOV and conversion rates. Fly mentions a breakdown of bundles for inventory sync, fulfilment, and returns, which is relevant for inventory management but less directly related to analyzing upsell performance.
Does one app support subscriptions better than the other?
While CartHook does not mention subscriptions, Fly explicitly refers to subscription features alongside quantity breaks and progressive free gifts. Therefore, Fly is likely better suited if the goal is to integrate subscriptions into bundle offerings.
Which app is better for large stores with complex product catalogs?
Fly: Bundles & Quantity Breaks focuses on optimized performance and promises no negative impact on store speed, indicating it is suitable for handling a large number of products. CartHook's focus on the post-purchase experience suggests its app might be less directly reliant on product catalogue size.
If I want to focus on getting customers to buy more *after* they click the checkout button, which is best?
CartHook Upsells is clearly designed for merchants wanting to focus on post-purchase upsells. Features such as one-click upsells and TYP upsells are directly relevant to this goal.
Get More From Your Shopify Store
Run audits for SEO, CRO, PageSpeed, and AI visibility. Get a clear report and actionable fixes.
Try Fix My Store