Track points, sign-up bonuses, and statement credits like never before. Plus a redesigned browser extension, iOS Shortcuts, and dozens of improvements.
CardStack helps you save $500+ every year on the credit cards you already carry. Maximize cashback and offers, never miss a statement credit, redeem your points at peak value, and let our AI agent do the heavy lifting — so your cards always pay you back more than they cost.
Stop leaving money on the table. Start with CardStack.
FEATURES:
- SAVE MORE WITH CARD-LINKED OFFERS
Automatically add Amex and Chase offers to your cards so you earn cashback and statement credits on purchases you're already making. Browse active offers, see personalized picks matched to your spending, and track every redemption — all in one place.
- NEVER MISS A STATEMENT CREDIT
Track every credit across all your cards automatically — dining, travel, streaming, airline, and more. See which credits are available, which are expiring soon, and which you've already used. Get reminders before you lose them.
- USE THE RIGHT CARD, EVERY TIME
Instantly see which card earns the most for dining, travel, groceries, gas, and every other category. Whether you're booking a flight or grabbing coffee, CardStack tells you the best card to pull out — so you never miss points or cashback.
- STACK AI AGENT — YOUR PERSONAL CARD ADVISOR
Meet Stack, a conversational AI agent that knows your entire card portfolio. Ask it anything:
"What's the best card for this hotel booking?"
"Am I missing any credits this month?"
"Compare my Sapphire Reserve vs. Platinum for a trip to Tokyo"
"How much value am I leaving on the table?"
Stack doesn't just answer — it takes action. It can mark credits as redeemed, set reminders, update your points balances, and generate weekly spending reports showing exactly where you earned and where you missed.
- SEE HOW MUCH YOU'RE EARNING (AND MISSING)
Connect your bank securely with Plaid and unlock full spending analysis:
See points earned vs. points missed on every transaction
Get your optimization score — what percentage of spend hit the best card
View breakdowns by category: flights, hotels, restaurants, groceries, and more
Get "Fix My Stack" recommendations showing exactly which card to swap in
- TRACK YOUR POINTS PORTFOLIO
Monitor balances across Amex Membership Rewards, Chase Ultimate Rewards, Capital One Miles, Citi ThankYou, and more. See estimated cash values, explore transfer partners, and know exactly what your points are worth.
- COVER YOUR ANNUAL FEES — OR CANCEL WITH CONFIDENCE
CardStack's Renewal Advisor calculates whether each card pays for itself based on your real usage. When your annual fee posts, get a clear verdict: keep, downgrade, or cancel — backed by data, not guesswork.
- SMART NOTIFICATIONS THAT SAVE YOU MONEY
Credits expiring soon
Annual fee renewal approaching
Offers about to expire
Missed optimization opportunities
AI-generated insights based on your spending
- CARDSTACK+ UNLOCKS THE FULL SYSTEM
Upgrade to unlock powerful automation and intelligence:
Stack AI Agent with full conversation history
Secure bank sync with Plaid for automatic transaction analysis
Auto-detect statement credits from your transactions
Earned vs. missed rewards analysis across every purchase
Safari extension that shows the best card while you shop
Automatically add Amex & Chase offers
Weekly AI spending reports and optimization scores
Personalized "Fix My Stack" recommendations
Sync across all your devices
YOUR CARDS ARE COSTING YOU — OR PAYING YOU. KNOW WHICH.
CardStack turns your credit cards into a money-saving system. Every credit tracked. Every offer captured. Every purchase optimized.
Download CardStack and start saving.
Terms of Use (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
I have been looking for an app to help track my welcome offer progress, while also quickly telling me which is the best card to use in each situation. CardStack fit that role perfectly! The developer is also super responsive and proactive on continuing to improve this app!
Developer Response
Glad to hear you are finding CardStack easy to use! I appreciate the review and thanks again for being a CardStack member! Adam,
Best app ever
Jwang815
I’m so happy to have found out about CardStack. It’s saved me so much manual effort from documenting on a spreadsheet and tracking benefits across a dozen cards. And I now have a tool to tell me which card to use for certain transactions so I don’t leave points on the table. Truly a fantastic tool!
Developer Response
Thank you! Appreciate all the feedback and support!
Fantastic
shua1649
Just the app I was looking for. Great user interface, logical and intuitive to navigate, easy to connect to accounts online, and it doesn’t overwhelm you with information. I can’t wait to see what future updates bring!
Very easy to use and super helpful
WwwNat6579–
This app has made it very easy for me to keep track of all the offers and discounts and ways to save money on all my credit cards. 100% recommend
Developer Response
Glad to hear! Thank you so much!
Points, bonuses, and credits got a big upgrade.
• Points — Redesigned portfolio with totals, program logos, year-to-date earnings, and optional custom point values. You can also sync Amex, Capital One, Bilt, and Marriott balances from the browser extension.
• Sign-up bonuses — Track your progress, minimum spend, and deadlines from Home and card details.
• Credits — Better redemption history, clearer partially used credits, and more accurate handling of multi-year and expiring credits, including Saks.
• Card open dates — Add your card's open date so annual fees and credits match your actual anniversary.
• Browser extension — Offer categories, one-tap redemption amounts, smarter auto-add, and merchant logos.
• iOS Shortcuts — Ask CardStack for your best card, ROI, or search your wallet.
• UI improvements — Updated typography, buttons, home widgets, and a smoother setup for notifications and the Safari extension.
• Bug fixes and performance improvements.
Version 1.5.0
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
Location
Contact Info
Identifiers
Usage Data
Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
SPACE ROBOTS INC
Size
117 MB
Category
Finance
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
iPad Requires iPadOS 17.0 or later.
Mac Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.