CardMax: Credit Card Picker

You could be leaving up to 3 percent on the table every time you swipe the wrong card. CardMax is the credit-card optimizer for people who carry five cards and never know which one to swipe. THE PROBLEM You have an Amex Gold, a Sapphire Reserve, a Custom Cash, a Venture X, and a daily-driver Apple Card. Every checkout becomes a tiny mental tax: dining or grocery? Online or in-store? Does Costco take Amex? Is Target a 5310 or 5411 merchant? You either guess, or you settle for whatever's on top of the wallet, and leave up to 3 percent back on the table every transaction. THE SOLUTION Snap a photo of your shopping cart, the storefront, or the receipt. CardMax reads the merchant, the category, and the items, then ranks every card in your wallet by effective return (multiplier times point value), and shows the math. You don't memorize merchant codes. You don't open a spreadsheet. You just see the answer. FEATURES Scan: Point the camera at what you're buying. CardMax identifies the merchant, the category code, the items, and the estimated total in a single pass. Works on storefronts, cart photos, receipts, even ad screens. Wallet: Add the twelve most popular US cards (Amex Gold, Amex Platinum, Sapphire Reserve, Sapphire Preferred, Freedom Unlimited, Freedom Flex, Custom Cash, Double Cash, Venture X, Apple Card, Discover It, BoA Customized Cash) and tag your primary spender. The engine knows the bonus tiers and the merchant quirks (Costco at 5300 not 5411, Whole Foods at 5411, Target at 5310, Costco Gas at 5542). Math: Every result modal shows the bonus rule that fired, the effective percent back, the next-best alternatives, and the dollar gap between using the optimal card versus your daily driver. No black box. Plan: Track open Sign-Up Bonuses, see your 5/24 status, and read recommended next-app dates for Amex once-per-lifetime, Citi 8/65/95, and Chase. Plan the next year of card opens without spreadsheets. Coach: Cap warnings before you blow your Freedom Flex rotating category. Balance reminders before annual fees post. Nudges for travel-portal expiring credits and transfer-partner sweet spots. Goal-aware: Tell CardMax whether you optimize for cash back, travel via portal, or transfer-partner sweet spots. Every recommendation re-prices points accordingly. Sapphire Reserve points transferred to Hyatt are often worth more than the same points spent through Chase Travel's variable Points Boost pricing. CardMax knows that. PRIVACY Photos go to your private storage and are processed by a vision model, never sold, never used to train anything, and you can wipe them whenever. CardMax never sees your card numbers. There is nothing to link: no Plaid handshake, no SSN, no credit pull. WHY CardMax is built by Daps Dev, the studio behind Receiptify, gymrotter, and Relay. Five cards in your wallet, one app that picks the right one. If you carry more than two cards, you are leaving money on the counter. CardMax tells you exactly how much, and how to stop. LEGAL Terms of Use (EULA): https://dapsdev.dev/cardmax/terms Privacy Policy: https://dapsdev.dev/cardmax/privacy CardMax is a credit card rewards optimizer, cash back maximizer, and points tracker: the best card picker for Amex, Chase Sapphire, Citi, Capital One, and Discover cash back rewards, travel miles, sign-up bonuses, and credit card churning.