Shopify App Comparison 2026
Upcharge Fees & Product Addons vs Simple Bundles & Kits: Shopify App Comparison (2026)
Upcharge Fees & Product Addons
Simple Bundles & Kits
Which Shopify upsell app increases AOV more? Compare pricing, features, ratings & real merchant reviews for Upcharge and Simple Bundles & Kits to find the best fit for your store.
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
Key Features
- Multiple bundle types (fixed, mix-and-match, build-a-box)
- Automatic SKU breakdown for 3PL fulfillment
- Real-time inventory synchronization
- AI-generated bundle suggestions from order history
- Volume discounts and quantity breaks
- BOGO and free gift functionality
- Subscription bundle support
- Shopify POS and ERP integration
Verdict on Simple
Simple Bundles is the go-to choice for merchants who need proper inventory sync and 3PL fulfillment with their bundles. Its automatic SKU breakdown sets it apart from other bundle apps that only handle the frontend.
Upcharge vs Kits — Side-by-Side Feature Comparison
Wondering which app offers the features you actually need? This feature-by-feature breakdown shows exactly where Upcharge and Simple Bundles & Kits differ — so you can make an informed decision for your Shopify store.
| Feature | Upcharge Fees | Simple Bundles & |
|---|---|---|
| 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.
Upcharge Fees & Product Addons
- Checkout
- Shopify POS
- Shopify Admin
Supported Languages
English
Simple Bundles & Kits
- Checkout
- Shopify POS
- Shopify Flow
- Shopify Admin
- Amazon by Codisto
- Hydrogen
- Judge.me Reviews
- POS & Shop app
Supported Languages
English