Cartly Slide Cart Drawer vs Fly: Bundles & Quantity Breaksfor Shopify (2026)
Cartly Slide Cart Drawer focuses on optimizing the cart and checkout experience to improve conversion rates, primarily through cart customization and a streamlined checkout process. It targets merchants who want to improve the user experience within the existing shopping flow by optimizing the cart drawer and checkout process. Features include free shipping upsells, trust badges, express checkout, and product add-ons, all within a customizable cart drawer. Fly: Bundles & Quantity Breaks, on the other hand, centers on increasing Average Order Value (AOV) through bundling, quantity discounts, and related upselling strategies. Fly targets merchants aiming to increase the value of each transaction by encouraging customers to buy more items. This is accomplished through features like fixed bundles, BOGO offers, quantity breaks, free gifts, and frequently bought together (FBT) recommendations. The core difference lies in the approach: Cartly focuses on conversion through cart optimization, while Fly prioritizes increased AOV through strategic product combinations and incentives. Both apps share the upsell and cross-sell category, but cater to different priorities.
At a Glance
Cartly Slide Cart Drawer
64 reviews
Fly: Bundles & Quantity Breaks
257 reviews
Detailed Overview
Cartly Slide Cart Drawer
Boost conversion rate with Cart Upsell Drawer made by Conversion Rate Optimization experts
Key Features
- Cart customization app with free shipping upsell cart goal & discount in cart
- Build trust with ATC payment icons, trust icons, terms and conditions checkbox
- Add fast checkout & express checkout button, buy now button one-click checkout
- Ajax cart drawer upsell app with side cart, up cart timer & product addons
- Upcart with sticky add to cart button, add to cart bar, add to cart sticky bar
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 | 5/5 | 5/5 |
Rating Cartly Slide Cart Drawer5/5 Fly: Bundles & Quantity Breaks5/5 | ||
| Reviews | 64 | 257 |
Reviews Cartly Slide Cart Drawer64 Fly: Bundles & Quantity Breaks257 | ||
| Primary Focus | Cart Conversion Optimization | Average Order Value (AOV) Increase |
Primary Focus Cartly Slide Cart DrawerCart Conversion Optimization Fly: Bundles & Quantity BreaksAverage Order Value (AOV) Increase | ||
| Key Strategy | Streamlined cart and checkout | Bundling, Quantity Discounts, & Upsells |
Key Strategy Cartly Slide Cart DrawerStreamlined cart and checkout Fly: Bundles & Quantity BreaksBundling, Quantity Discounts, & Upsells | ||
| Checkout Optimization | Fast Checkout, Express Checkout, Buy Now button | Bundles can improve checkout, but is not the app's primary focus |
Checkout Optimization Cartly Slide Cart DrawerFast Checkout, Express Checkout, Buy Now button Fly: Bundles & Quantity BreaksBundles can improve checkout, but is not the app's primary focus | ||
| Trust Building | Trust badges and terms and conditions checkbox | N/A |
Trust Building Cartly Slide Cart DrawerTrust badges and terms and conditions checkbox Fly: Bundles & Quantity BreaksN/A | ||
| Ease of Use (implied) | Cart Customization indicates customization skill might be needed | Zero coding |
Ease of Use (implied) Cartly Slide Cart DrawerCart Customization indicates customization skill might be needed Fly: Bundles & Quantity BreaksZero coding | ||
| Target Merchant | Merchants wanting to improve checkout UX | Merchants needing to improve AOV |
Target Merchant Cartly Slide Cart DrawerMerchants wanting to improve checkout UX Fly: Bundles & Quantity BreaksMerchants needing to improve AOV | ||
| Value Proposition | Improve conversion rates through improved UX in cart and checkout | Increase AOV through bundles, discounts and free gifts. |
Value Proposition Cartly Slide Cart DrawerImprove conversion rates through improved UX in cart and checkout Fly: Bundles & Quantity BreaksIncrease AOV through bundles, discounts and free gifts. | ||
Our Verdict
If your primary goal is to optimize the cart and checkout flow to improve conversion rates, Cartly Slide Cart Drawer is the better choice. Its features are specifically designed to create a seamless and trustworthy purchasing experience within the cart. However, if your focus is on increasing the average order value by encouraging customers to buy more items per order, then Fly: Bundles & Quantity Breaks is more suitable. Its bundling, quantity discounts, and cross-selling functionalities are powerful tools for boosting AOV.
For merchants with a low AOV and decent conversion rates, Fly is likely the more impactful app. For merchants with a high AOV but low conversion rates, Cartly may provide the needed UX improvements. If both conversion rates and AOV are low, addressing conversion issues with Cartly first might make the larger orders incentivized by Fly more likely.
Common Questions
Which app is easier to use?
Fly: Bundles & Quantity Breaks claims to offer 'Zero coding', suggesting a simpler setup and management process, whereas Cartly mentions extensive cart customization which can require technical skills.
Which app offers a free shipping incentive?
Cartly Slide Cart Drawer directly supports free shipping upsells within the cart drawer. Fly: Bundles & Quantity Breaks does not mention a free shipping incentive but free gifts can be used to the same effect.
Which app focuses more on building trust?
Cartly Slide Cart Drawer explicitly mentions trust badges and terms and conditions checkboxes, which directly contribute to building customer trust. Fly does not.
Which app is better for stores with a limited product catalog?
Cartly could be a better choice for stores with limited products, as optimizing the checkout flow and presenting the products in a better UX can help sales. For Fly to perform well, a well-stocked store is required to make effective product bundles.
Which app is better for large inventory syncing?
Fly: Bundles & Quantity Breaks mentions 'inventory sync', so this may be needed if the merchant requires bundled inventory syncing. Cartly does not mention inventory syncing.
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