CardStack: Best Card Extension
Credit Card Shopping Assistant
Only for Mac
Free
Mac
Sync your points balances from Amex, Chase, Capital One, Marriott, and Bilt—with more rewards programs coming soon.
Auto-add credit card offers and see the best card to use on any site while you shop online.
CardStack helps you get more value from your credit cards while you shop online.
It recommends the best card to use for a purchase based on rewards, bonus categories, credits, and available savings opportunities, so you can stop guessing and start earning more.
No more missed savings. No more forgotten credits. No more leaving rewards on the table.
FEATURES
Use the best card every time
CardStack analyzes your cards and shows which one gives you the best return for the purchase in front of you.
Surface savings automatically
See available savings opportunities across your cards while you shop.
Track credits and card benefits
Monitor statement credits, perks, and annual fee value so you know which cards are actually worth keeping.
Maximize rewards
Earn more points, miles, and cash back across your credit cards.
Fast and simple
CardStack is built for clarity and speed, so you can make the right decision in seconds.
Privacy first
CardStack does not store your full card numbers and does not sell your data.
Install CardStack and get more value from every card in your wallet.
Disclaimer: CardStack is an independent tool and is not affiliated with, endorsed by, or sponsored by American Express, Chase, or any other financial institution. All trademarks are the property of their respective owners.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
You can now sync balances from Amex, Chase, Capital One, Marriott, and Bilt, making it easier to see your rewards in one place. Support for more rewards programs is coming soon.
This release also includes bug fixes and performance improvements.
The developer, SPACE ROBOTS INC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Financial Info
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SPACE ROBOTS INC
- Size
- 84.8 MB
- Category
- Shopping
- Compatibility
Requires macOS 11.0 or later.
- Mac
Requires macOS 11.0 or later.
- Mac
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 SPACE ROBOTS INC