Shopify App Comparison 2026
Opus Cart Drawer Cart Upsell vs Upcharge Fees & Product Addons: Shopify App Comparison (2026)
Opus Cart Drawer Cart Upsell
529 reviews
VS
Upcharge Fees & Product Addons
137 reviews
Which Shopify upsell app increases AOV more? Compare pricing, features, ratings & real merchant reviews for Opus and Upcharge Fees & Product Addons to find the best fit for your store.
Key Features
- Upsells & Cross-sell: Boost AOV with Frequently Bought Together offers
- Free Gifts: Encourage higher spending with Free Gifts based on cart variants.
- Rewards Bar: Encourage customers to buy more to get free shipping and rewards.
- Drive Urgency: Boost conversions with countdown timers & limited-time deals.
- Abandoned Cart: Recover sales by tracking & understanding why customers leave.
Built for Shopify
Our surcharge app helps you apply conditional fees, late fees, and automatic fees
View Full DetailsKey Features
- Apply klarna fees, credit card fees, fees payment, or a payment method fee
- Set a fee rule for a flat fee, cart fee, percentage fee, or extra fee
- Extra fees manager for mandatory fees, tariff surcharge & extra charge
- Link price addons, deposits and fees directly to your orders and fees
- Add a fee, cash on delivery fee, surcharge fee, or fees and surcharges
Opus vs Addons — Side-by-Side Feature Comparison
Wondering which app offers the features you actually need? This feature-by-feature breakdown shows exactly where Opus and Upcharge Fees & Product Addons differ — so you can make an informed decision for your Shopify store.
| Feature | Opus Cart | Upcharge Fees & |
|---|---|---|
| Cart drawer / slide cart | ||
| Post-purchase upsell | ||
| Frequently bought together | ||
| Free shipping bar | ||
| Free gift / BOGO | ||
| Product page upsell | ||
| AI recommendations | ||
| Built for Shopify | ||
| Free plan available | ||
| Custom branding |
Integration & Compatibility Comparison
App integrations matter — especially when you're running multiple tools in your Shopify stack. Here's what each app connects with out of the box.
Opus Cart Drawer Cart Upsell
Built for Shopify
- Checkout
- Shopify Admin
- Avis Options, Avis Bundles
- Checkout
- Ecomposer, Gempages
- Subscriptions App
- Translate & Adapt
- Transtore, Transcy
Supported Languages
English, Chinese (Simplified), French, Spanish, Japanese
Upcharge Fees & Product Addons
Built for Shopify
- Checkout
- Shopify POS
- Shopify Admin
Supported Languages
English