You're leaving credit card rewards on the table.
Kaldex tells you which card to use at every purchase — so you never miss a dollar of cashback again.
Kaldex tells you which card to use at every purchase — so you never miss a dollar of cashback again.
Download for iOS
Be first to know when we launch on iOS.
Use Amex Gold — 4x at Whole Foods
You earned $147.20 in rewards this month
Works with every major card issuer — so you never miss a reward
Features
Everything You Need to Maximize Rewards
Features
Everything You Need to Maximize Rewards
Smart Usage Score
One number that shows how well you're playing the rewards game. See where you're winning and where you're leaving money on the table.
Smart Usage Score
One number that shows how well you're playing the rewards game. See where you're winning and where you're leaving money on the table.
Smart Usage Score
One number that shows how well you're playing the rewards game. See where you're winning and where you're leaving money on the table.
Total Rewards Dashboard
Points, cashback, and miles across every card — all in one place. No more logging into five different apps.
Total Rewards Dashboard
Points, cashback, and miles across every card — all in one place. No more logging into five different apps.
Total Rewards Dashboard
Points, cashback, and miles across every card — all in one place. No more logging into five different apps.
Always Know Which Card to Use
Kaldex tells you the best card for every merchant and category so you never miss a bonus again.
Always Know Which Card to Use
Kaldex tells you the best card for every merchant and category so you never miss a bonus again.
Always Know Which Card to Use
Kaldex tells you the best card for every merchant and category so you never miss a bonus again.
Bank-Level Security
Your cards connect securely through Plaid. We read transactions to optimize rewards — we never touch your money.
Bank-Level Security
Your cards connect securely through Plaid. We read transactions to optimize rewards — we never touch your money.
Bank-Level Security
Your cards connect securely through Plaid. We read transactions to optimize rewards — we never touch your money.
Merchant-Level Accuracy
Kaldex knows that Uber and Uber Eats earn different bonuses, and that Kroger subsidiaries count as grocery. Over 100 merchant-specific rules and growing.
Merchant-Level Accuracy
Kaldex knows that Uber and Uber Eats earn different bonuses, and that Kroger subsidiaries count as grocery. Over 100 merchant-specific rules and growing.
Merchant-Level Accuracy
Kaldex knows that Uber and Uber Eats earn different bonuses, and that Kroger subsidiaries count as grocery. Over 100 merchant-specific rules and growing.
See Where Your Money Goes
Automatic categorization of every transaction into clear spending groups like Eating Out, Groceries, Getting Around, and more.
Supported Cards
Works with the cards you already carry
Supported Cards
Works with the cards you already carry
How it works
From setup to savings — just three simple steps.
How it works
From setup to savings — just three simple steps.
01
Connect your cards
Securely link your credit cards through Plaid in under a minute. We read transactions — we never touch your money.
01
Connect your cards
Securely link your credit cards through Plaid in under a minute. We read transactions — we never touch your money.
02
Spend like normal
Keep using your cards as usual. Kaldex automatically categorizes every transaction and maps it to the right bonus category.
02
Spend like normal
Keep using your cards as usual. Kaldex automatically categorizes every transaction and maps it to the right bonus category.
03
Earn more rewards
See which card earns the most at every store. Your Smart Usage Score tracks how well you're optimizing over time.
03
Earn more rewards
See which card earns the most at every store. Your Smart Usage Score tracks how well you're optimizing over time.
FAQ
Common Questions
FAQ
Common Questions
What does Kaldex actually do?
Is my financial data safe?
How is this different from Mint or a budgeting app?
Which credit cards are supported?
Is Kaldex free?
From the founder
Why I Built Kaldex
From the founder
Why I Built Kaldex
I built Kaldex because I was tired of Googling which card to use at every store. If you carry more than one credit card, this app is for you.
Huzaif
Founder, Kaldex
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Cards supported
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Spending categories
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Merchant-specific rules
Contact
Get in Touch
Contact
Get in Touch
Questions or feedback? Reach us anytime.